- A3
- B4
- C5
- D6
The multiples of 7 between 20 and 50 are: 21 (7×3), 28 (7×4), 35 (7×5), 42 (7×6), 49 (7×7). There are 5 such multiples. Let me recheck. "Between 20 and 50" typically means exclusive. So 21, 28, 35, 42, 49. That's 5. My options are A:3 B:4 C:5 D:6. So 5 is the correct count.
Answer: C Explanation:The multiples of 7 that lie strictly between 20 and 50 are 21 (7x3), 28 (7x4), 35 (7x5), 42 (7x6), and 49 (7x7). Counting these, there are 5 multiples.
More Questions on Playing With Numbers
The least number that is divisible by all numbers from 1 to 5 (inclusive) is:
→ 2Which digit should be at the unit's place of a number if it is divisible by both 2 and 5?
→ 3Two ropes of length 15m and 20m are to be cut into small pieces of equal length. What is the greatest possible length of each piece?
→ 4If the HCF of two numbers is 8, which of the following cannot be their LCM?
→ 5Which of the following is true about factors?
→ 6What is the sum of the first five prime numbers?
→ 7A number that has more than two factors is called a:
→ 8If the number 1A3 is divisible by 3, what are the possible values of A?
→ 9Which of the following numbers is an even composite number?
→ 10The LCM of two numbers is 60 and their HCF is 5. If one of the numbers is 20, what is the other number?
→ 11What is the smallest number that must be added to 3456 to make it divisible by 10?
→ 12The HCF of 45 and 75 is:
→ 13If a number is divisible by 11, which of these is correct about the number?
→ 14Which of the following is not a factor of 120?
→ 15What is the difference between the smallest 3-digit number and the largest 2-digit number?
→ 16A shopkeeper wants to arrange 120 apples and 180 oranges into identical boxes such that each box contains only one type of fruit and the greatest possible number of fruits. How many fruits will be in each box?
→ 17Which of the following numbers is divisible by 9 but NOT by 6?
→ 18What is the sum of the HCF and LCM of 12 and 18?
→ 19How many factors does a prime number have?
→ 20What is the smallest 3-digit number formed using digits 1, 2, 3 exactly once that is divisible by 3?
→ 21If an odd number is multiplied by an odd number, the product is always:
→ 22Which number is both a factor of 24 and a multiple of 4?
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→ 24What is the smallest number that leaves a remainder of 1 when divided by 3, 4, and 5?
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→ 27A number is divisible by 10 if its last digit is:
→ 28Which of the following numbers has exactly 3 factors?
→ 29What is the greatest 4-digit number that is exactly divisible by 3 and 5?
→ 30If a number is divisible by 8, it must also be divisible by:
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→ 33Which of the following is divisible by both 3 and 5?
→ 34What is the HCF of 17 and 19?
→ 35I am a number between 70 and 80. I am a multiple of both 3 and 5. What number am I?
→ 36What is the least number of mangoes that can be put into baskets containing 9, 12, or 15 mangoes each, without any remaining?
→ 37Which of the following is a composite number?
→ 38What is the LCM of 16, 24, and 36?
→ 39What is the HCF of 105, 120, and 150?
→ 40If a number is divisible by both 2 and 3, it is also divisible by:
→ 41Which of the following is the correct prime factorization of 144?
→ 42The sum of three consecutive odd numbers is 93. What is the largest of these numbers?
→ 43Which of the following is a pair of twin primes?
→ 44What is the HCF of two consecutive even numbers?
→ 45Which of the following is the smallest number that is a multiple of 6, 8, and 10?
→ 46A number is divisible by 9 if the sum of its digits is divisible by 9. Which digit should replace * in 24*71 to make it divisible by 9?
→ 47If two numbers are co-prime, what is their HCF and LCM?
→ 48If the prime factorization of a number is 2³ * 3² * 5¹, how many factors does this number have?
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→ 50What is the smallest composite number?
→ 51Which of the following numbers is divisible by 5 but not by 10?
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→ 53Find the greatest number that will divide 66 and 110 leaving remainders 6 and 2 respectively.
→ 54Consider the number 15. Which of the following statements is true?
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→ 56Which of the following pairs of numbers are co-prime?
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→ 59What is the smallest number which when divided by 12, 15, and 20 leaves a remainder of 5 in each case?
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