{"id":11966,"date":"2025-07-23T08:14:54","date_gmt":"2025-07-23T07:14:54","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=11966"},"modified":"2025-07-30T06:51:19","modified_gmt":"2025-07-30T05:51:19","slug":"number-system","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/07\/23\/number-system\/","title":{"rendered":"Number System"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">1. Which of the following is a rational number?<\/h1>\n\n\n\n<p>A) \u221a2<\/p>\n\n\n\n<p>B) \u03c0<\/p>\n\n\n\n<p>C) 3\/7<\/p>\n\n\n\n<p>D) e<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 3\/7<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: A rational number is a number that can be expressed as a fraction of two integers. 3\/7 is rational. \u221a2, \u03c0, and e are irrational.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">2. Which of the following numbers is not a whole number?<\/h1>\n\n\n\n<p>A) 0<\/p>\n\n\n\n<p>B) 1<\/p>\n\n\n\n<p>C) 2<\/p>\n\n\n\n<p>D) -1<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: D) -1<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Whole numbers start from 0 and include all positive integers. Negative numbers are not whole numbers.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">3. What is the smallest prime number?<\/h1>\n\n\n\n<p>A) 0<\/p>\n\n\n\n<p>B) 1<\/p>\n\n\n\n<p>C) 2<\/p>\n\n\n\n<p>D) 3<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 2<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 2 is the smallest and the only even prime number.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">4. What is the HCF of 18 and 24?<\/h1>\n\n\n\n<p>A) 2<\/p>\n\n\n\n<p>B) 3<\/p>\n\n\n\n<p>C) 6<\/p>\n\n\n\n<p>D) 12<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 6<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: The highest common factor (HCF) of 18 and 24 is 6.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">5. Every integer is a:<\/h1>\n\n\n\n<p>A) Rational number<\/p>\n\n\n\n<p>B) Natural number<\/p>\n\n\n\n<p>C) Whole number<\/p>\n\n\n\n<p>D) Prime number<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) Rational number<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Every integer can be written as a fraction (e.g., -2 = -2\/1), so it is a rational number.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">6. The decimal representation of 1\/3 is:<\/h1>\n\n\n\n<p>A) 0.33<\/p>\n\n\n\n<p>B) 0.333<\/p>\n\n\n\n<p>C) 0.333\u2026 (repeating)<\/p>\n\n\n\n<p>D) 0.34<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 0.333\u2026 (repeating)<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 1 divided by 3 gives a repeating decimal: 0.333&#8230;<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">7. Which number is not a factor of 36?<\/h1>\n\n\n\n<p>A) 2<\/p>\n\n\n\n<p>B) 3<\/p>\n\n\n\n<p>C) 5<\/p>\n\n\n\n<p>D) 6<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 5<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 5 is not a factor of 36, as 36 \u00f7 5 is not an integer.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">8. The LCM of 12 and 18 is:<\/h1>\n\n\n\n<p>A) 36<\/p>\n\n\n\n<p>B) 48<\/p>\n\n\n\n<p>C) 24<\/p>\n\n\n\n<p>D) 72<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 36<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: LCM of 12 and 18 is 36, the smallest number divisible by both.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">9. Which of the following is an irrational number?<\/h1>\n\n\n\n<p>A) 1\/4<\/p>\n\n\n\n<p>B) 0.25<\/p>\n\n\n\n<p>C) \u221a5<\/p>\n\n\n\n<p>D) 7<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) \u221a5<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: \u221a5 cannot be expressed as a fraction, hence irrational.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">10. The number 121 is a:<\/h1>\n\n\n\n<p>A) Prime number<\/p>\n\n\n\n<p>B) Composite number<\/p>\n\n\n\n<p>C) Irrational number<\/p>\n\n\n\n<p>D) Whole number<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) Composite number<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 121 = 11 \u00d7 11, so it is a composite number.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">11. The number of prime numbers between 1 and 20 is:<\/h1>\n\n\n\n<p>A) 6<\/p>\n\n\n\n<p>B) 7<\/p>\n\n\n\n<p>C) 8<\/p>\n\n\n\n<p>D) 9<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 8<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: The primes are: 2, 3, 5, 7, 11, 13, 17, 19.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">12. What is the value of 2\u2075?<\/h1>\n\n\n\n<p>A) 10<\/p>\n\n\n\n<p>B) 25<\/p>\n\n\n\n<p>C) 32<\/p>\n\n\n\n<p>D) 64<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 32<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 2\u2075 = 2\u00d72\u00d72\u00d72\u00d72 = 32<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">13. Which of these numbers is divisible by 9?<\/h1>\n\n\n\n<p>A) 123<\/p>\n\n\n\n<p>B) 135<\/p>\n\n\n\n<p>C) 154<\/p>\n\n\n\n<p>D) 172<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 135<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 1+3+5 = 9, and 9 is divisible by 9.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">14. Which is the smallest odd prime number?<\/h1>\n\n\n\n<p>A) 1<\/p>\n\n\n\n<p>B) 2<\/p>\n\n\n\n<p>C) 3<\/p>\n\n\n\n<p>D) 5<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 3<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: The smallest odd prime is 3. 2 is even.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">15. What is 1001 \u00d7 101?<\/h1>\n\n\n\n<p>A) 101101<\/p>\n\n\n\n<p>B) 102201<\/p>\n\n\n\n<p>C) 100101<\/p>\n\n\n\n<p>D) 101101<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: D) 101101<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Direct multiplication gives 101101.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">16. A number divisible by both 2 and 3 is divisible by:<\/h1>\n\n\n\n<p>A) 5<\/p>\n\n\n\n<p>B) 6<\/p>\n\n\n\n<p>C) 4<\/p>\n\n\n\n<p>D) 8<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 6<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: LCM of 2 and 3 is 6.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">17. Which number is both a square and a cube?<\/h1>\n\n\n\n<p>A) 8<\/p>\n\n\n\n<p>B) 16<\/p>\n\n\n\n<p>C) 64<\/p>\n\n\n\n<p>D) 81<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 64<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 64 = 8\u00b2 = 4\u00b3<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">18. 0 is a:<\/h1>\n\n\n\n<p>A) Natural number<\/p>\n\n\n\n<p>B) Whole number<\/p>\n\n\n\n<p>C) Prime number<\/p>\n\n\n\n<p>D) Irrational number<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) Whole number<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 0 is a whole number, but not natural or prime.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">19. What is the unit digit of 7\u2074?<\/h1>\n\n\n\n<p>A) 1<\/p>\n\n\n\n<p>B) 3<\/p>\n\n\n\n<p>C) 9<\/p>\n\n\n\n<p>D) 1<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 1<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 7\u2074 = 2401 \u2192 unit digit = 1<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">20. Which number is divisible by 11?<\/h1>\n\n\n\n<p>A) 121<\/p>\n\n\n\n<p>B) 143<\/p>\n\n\n\n<p>C) 231<\/p>\n\n\n\n<p>D) 351<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 121<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 121 \u00f7 11 = 11, so it is divisible.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">21. How many digits are there in 10\u2075?<\/h1>\n\n\n\n<p>A) 4<\/p>\n\n\n\n<p>B) 5<\/p>\n\n\n\n<p>C) 6<\/p>\n\n\n\n<p>D) 7<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 6<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 10\u2075 = 100000 \u2192 6 digits<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">22. A number which is divisible by 2, 3, and 4 must be divisible by:<\/h1>\n\n\n\n<p>A) 6<\/p>\n\n\n\n<p>B) 8<\/p>\n\n\n\n<p>C) 12<\/p>\n\n\n\n<p>D) 24<\/p>\n\n\n\n<p>Answer: C) 12<\/p>\n\n\n\n<p>Explanation: LCM(2,3,4) = 12<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">23. Which is a twin prime pair?<\/h1>\n\n\n\n<p>A) 3 and 5<\/p>\n\n\n\n<p>B) 7 and 11<\/p>\n\n\n\n<p>C) 11 and 13<\/p>\n\n\n\n<p>D) 17 and 19<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 11 and 13<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Twin primes differ by 2. So 11 and 13 are a pair.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">24. 999 is divisible by:<\/h1>\n\n\n\n<p>A) 3<\/p>\n\n\n\n<p>B) 9<\/p>\n\n\n\n<p>C) 27<\/p>\n\n\n\n<p>D) All of the above<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: D) All of the above<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 999 \u00f7 3 = 333; \u00f79 = 111; \u00f727 = 37<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">25. The sum of first 10 natural numbers is:<\/h1>\n\n\n\n<p>A) 45<\/p>\n\n\n\n<p>B) 50<\/p>\n\n\n\n<p>C) 55<\/p>\n\n\n\n<p>D) 60<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 55<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Sum = n(n+1)\/2 = 10(11)\/2 = 55<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">26. The product of two odd numbers is:<\/h1>\n\n\n\n<p>A) Even<\/p>\n\n\n\n<p>B) Odd<\/p>\n\n\n\n<p>C) Prime<\/p>\n\n\n\n<p>D) Composite<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) Odd<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Odd \u00d7 Odd = Odd<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">27. Which of the following is not a perfect square?<\/h1>\n\n\n\n<p>A) 121<\/p>\n\n\n\n<p>B) 144<\/p>\n\n\n\n<p>C) 169<\/p>\n\n\n\n<p>D) 130<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: D) 130<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 130 is not a square of any integer.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">28. The number 81 is equal to:<\/h1>\n\n\n\n<p>A) 9\u00b2<\/p>\n\n\n\n<p>B) 3\u00b3<\/p>\n\n\n\n<p>C) 8\u00b2<\/p>\n\n\n\n<p>D) 7\u00b2<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 9\u00b2<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 9\u00d79 = 81<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">29. 100 is divisible by which of the following?<\/h1>\n\n\n\n<p>A) 6<\/p>\n\n\n\n<p>B) 9<\/p>\n\n\n\n<p>C) 10<\/p>\n\n\n\n<p>D) 11<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 10<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 100 \u00f7 10 = 10<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">30. Which of the following is a composite number?<\/h1>\n\n\n\n<p>A) 3<\/p>\n\n\n\n<p>B) 5<\/p>\n\n\n\n<p>C) 9<\/p>\n\n\n\n<p>D) 7<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 9<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 9 = 3 \u00d7 3, so it&#8217;s not prime.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">31. The only even prime number is:<\/h1>\n\n\n\n<p>A) 0<\/p>\n\n\n\n<p>B) 2<\/p>\n\n\n\n<p>C) 4<\/p>\n\n\n\n<p>D) 6<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 2<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 2 is the only even number divisible only by 1 and itself.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">32. Prime factorization of 30 is:<\/h1>\n\n\n\n<p>A) 2 \u00d7 3 \u00d7 5<\/p>\n\n\n\n<p>B) 2 \u00d7 5 \u00d7 6<\/p>\n\n\n\n<p>C) 3 \u00d7 10<\/p>\n\n\n\n<p>D) 2 \u00d7 15<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 2 \u00d7 3 \u00d7 5<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Prime factors of 30 are 2, 3, and 5.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">33. Which number is divisible by both 3 and 5?<\/h1>\n\n\n\n<p>A) 10<\/p>\n\n\n\n<p>B) 12<\/p>\n\n\n\n<p>C) 15<\/p>\n\n\n\n<p>D) 20<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 15<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 15 \u00f7 3 = 5, and 15 \u00f7 5 = 3<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">34. The square of 11 is:<\/h1>\n\n\n\n<p>A) 111<\/p>\n\n\n\n<p>B) 121<\/p>\n\n\n\n<p>C) 131<\/p>\n\n\n\n<p>D) 141<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 121<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 11 \u00d7 11 = 121<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">35. Which number has both 2 and 3 as its factors?<\/h1>\n\n\n\n<p>A) 5<\/p>\n\n\n\n<p>B) 6<\/p>\n\n\n\n<p>C) 7<\/p>\n\n\n\n<p>D) 9<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 6<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 6 = 2 \u00d7 3<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">36. The number 0 is:<\/h1>\n\n\n\n<p>A) Natural number<\/p>\n\n\n\n<p>B) Whole number<\/p>\n\n\n\n<p>C) Prime number<\/p>\n\n\n\n<p>D) Negative number<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) Whole number<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 0 is the first whole number but not a natural number.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">37. What is the sum of the first 5 odd numbers?<\/h1>\n\n\n\n<p>A) 15<\/p>\n\n\n\n<p>B) 20<\/p>\n\n\n\n<p>C) 25<\/p>\n\n\n\n<p>D) 30<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 25<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 1+3+5+7+9 = 25<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">38. Which of these is a factor of 45?<\/h1>\n\n\n\n<p>A) 4<\/p>\n\n\n\n<p>B) 5<\/p>\n\n\n\n<p>C) 7<\/p>\n\n\n\n<p>D) 8<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 5<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 45 \u00f7 5 = 9<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">39. How many prime numbers are there between 10 and 20?<\/h1>\n\n\n\n<p>A) 2<\/p>\n\n\n\n<p>B) 3<\/p>\n\n\n\n<p>C) 4<\/p>\n\n\n\n<p>D) 5<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 4<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 11, 13, 17, 19<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">40. Which number is a cube number?<\/h1>\n\n\n\n<p>A) 8<\/p>\n\n\n\n<p>B) 10<\/p>\n\n\n\n<p>C) 12<\/p>\n\n\n\n<p>D) 15<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: A) 8<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 2\u00b3 = 8<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">41. The sum of even numbers from 1 to 10 is:<\/h1>\n\n\n\n<p>A) 25<\/p>\n\n\n\n<p>B) 30<\/p>\n\n\n\n<p>C) 35<\/p>\n\n\n\n<p>D) 40<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 30<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 2+4+6+8+10 = 30<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">42. Which number is a multiple of 4 but not of 8?<\/h1>\n\n\n\n<p>A) 8<\/p>\n\n\n\n<p>B) 12<\/p>\n\n\n\n<p>C) 16<\/p>\n\n\n\n<p>D) 24<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 12<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 12 is divisible by 4, but not by 8.<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">43. The next prime number after 19 is:<\/h1>\n\n\n\n<p>A) 21<\/p>\n\n\n\n<p>B) 23<\/p>\n\n\n\n<p>C) 25<\/p>\n\n\n\n<p>D) 27<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 23<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Next prime after 19 is 23<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">44. What is the LCM of 4 and 6?<\/h1>\n\n\n\n<p>A) 8<\/p>\n\n\n\n<p>B) 10<\/p>\n\n\n\n<p>C) 12<\/p>\n\n\n\n<p>D) 16<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 12<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 4 and 6 LCM = 12<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">45. 10\u00b3 = ?<\/h1>\n\n\n\n<p>A) 100<\/p>\n\n\n\n<p>B) 1000<\/p>\n\n\n\n<p>C) 10000<\/p>\n\n\n\n<p>D) 10<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 1000<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 10\u00b3 = 10 \u00d7 10 \u00d7 10 = 1000<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">46. What is the HCF of 20 and 28?<\/h1>\n\n\n\n<p>A) 2<\/p>\n\n\n\n<p>B) 4<\/p>\n\n\n\n<p>C) 6<\/p>\n\n\n\n<p>D) 8<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 4<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: HCF(20, 28) = 4<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">47. The smallest 3-digit number is:<\/h1>\n\n\n\n<p>A) 001<\/p>\n\n\n\n<p>B) 010<\/p>\n\n\n\n<p>C) 100<\/p>\n\n\n\n<p>D) 101<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 100<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Smallest 3-digit number = 100<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">48. Which is an even prime number?<\/h1>\n\n\n\n<p>A) 1<\/p>\n\n\n\n<p>B) 2<\/p>\n\n\n\n<p>C) 4<\/p>\n\n\n\n<p>D) 6<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 2<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: Only even prime is 2<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">49. 5\u00b2 = ?<\/h1>\n\n\n\n<p>A) 10<\/p>\n\n\n\n<p>B) 20<\/p>\n\n\n\n<p>C) 25<\/p>\n\n\n\n<p>D) 30<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: C) 25<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 5\u00b2 = 5 \u00d7 5 = 25<\/h2>\n\n\n\n<h1 class=\"wp-block-heading\">50. Which number is divisible by 2, 3, and 6?<\/h1>\n\n\n\n<p>A) 10<\/p>\n\n\n\n<p>B) 12<\/p>\n\n\n\n<p>C) 15<\/p>\n\n\n\n<p>D) 18<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Answer: B) 12<\/h2>\n\n\n\n<h2 class=\"wp-block-heading\">Explanation: 12 \u00f7 2 = 6, \u00f73 = 4, \u00f76 = 2<\/h2>\n","protected":false},"excerpt":{"rendered":"<p>1. Which of the following is a rational number? A) \u221a2 B) \u03c0 C) 3\/7 D) e Answer: C) 3\/7 Explanation: A rational number is a number that can be expressed as a fraction of two integers. 3\/7 is rational. \u221a2, \u03c0, and e are irrational. 2. Which of the following numbers is not a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-11966","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-blog"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/11966","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=11966"}],"version-history":[{"count":6,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/11966\/revisions"}],"predecessor-version":[{"id":11975,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/11966\/revisions\/11975"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=11966"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=11966"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=11966"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}