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Class 5 Exam  >  Class 5 Tests  >  Test: Factors and Multiples- 2 - Class 5 MCQ

Test: Factors and Multiples- 2 - Class 5 MCQ


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10 Questions MCQ Test - Test: Factors and Multiples- 2

Test: Factors and Multiples- 2 for Class 5 2025 is part of Class 5 preparation. The Test: Factors and Multiples- 2 questions and answers have been prepared according to the Class 5 exam syllabus.The Test: Factors and Multiples- 2 MCQs are made for Class 5 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Factors and Multiples- 2 below.
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Test: Factors and Multiples- 2 - Question 1
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What are the common factors of 9 and 36?

Detailed Solution for Test: Factors and Multiples- 2 - Question 1

Factors of 9 = 1, 3, 9
Factors of 36 = 1, 3, 4, 6, 9, 12, 36
Common factors are 1, 3, 9.

Test: Factors and Multiples- 2 - Question 2
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Find three common multiples of 18 and 6.

Detailed Solution for Test: Factors and Multiples- 2 - Question 2

Multiples of 18 = 18, 36, 54...
Multiples of 6 = 6, 12, 18,...
The first common multiple will be 18 And the next common multiples will be multiples of 18
Hence, first three common multiples of 18, 6 are 18, 36, 54.

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Test: Factors and Multiples- 2 - Question 3
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How many prime numbers are there from 50 to 100?

Detailed Solution for Test: Factors and Multiples- 2 - Question 3

The prime numbers between 50 and 100 are 53, 59, 61, 67, 71, 73, 79, 83, 89 and 97, which are 10 in number.

Test: Factors and Multiples- 2 - Question 4
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How is 20 written as the product of primes?
Detailed Solution for Test: Factors and Multiples- 2 - Question 4

20 expressed as a product of primes is 2 × 2 × 5.

Test: Factors and Multiples- 2 - Question 5
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Identify the correct statement.
Detailed Solution for Test: Factors and Multiples- 2 - Question 5

A. Correct. For any two coprime numbers, since their greatest common divisor (GCD) is 1, the least common multiple (LCM) is equal to their product.

B. Incorrect. Twin primes are pairs of primes that differ by 2; their highest common factor (H.C.F.) is 1 because they are distinct primes.

C. Incorrect. The largest factor of a number is the number itself.

D. Correct. The smallest factor of any number is always 1, except for the number 1, which only has one factor.

Test: Factors and Multiples- 2 - Question 6
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How many times the H.C.F. of 11, 33 and 88 is their L.C.M?
Detailed Solution for Test: Factors and Multiples- 2 - Question 6

H.C.F. of 11, 33 and 88 is 11.
L.C.M. of 11,33 and 88 is 11 × 3 × 8 = 11 × 24 = H.C.F .× 24.

Test: Factors and Multiples- 2 - Question 7
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Identify an example for co-prime numbers.
Detailed Solution for Test: Factors and Multiples- 2 - Question 7

Co-prime numbers are two numbers that have no common factors other than 1. Let's check each pair to identify the co-prime numbers:

  1. 25, 14

    • Factors of 25: 1, 5, 25
    • Factors of 14: 1, 2, 7, 14
    • Common factor: 1 (so, 25 and 14 are co-prime)

  2. 18, 16

    • Factors of 18: 1, 2, 3, 6, 9, 18
    • Factors of 16: 1, 2, 4, 8, 16
    • Common factors: 1, 2 (so, 18 and 16 are not co-prime)

  3. 9, 18

    • Factors of 9: 1, 3, 9
    • Factors of 18: 1, 2, 3, 6, 9, 18
    • Common factors: 1, 3, 9 (so, 9 and 18 are not co-prime)

  4. 11, 77

    • Factors of 11: 1, 11
    • Factors of 77: 1, 7, 11, 77
    • Common factors: 1, 11 (so, 11 and 77 are not co-prime)

Therefore, the example of co-prime numbers is: 25, 14.

Test: Factors and Multiples- 2 - Question 8
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The L.C.M. of two numbers is 10 times their H.C.F. Find the numbers.
Detailed Solution for Test: Factors and Multiples- 2 - Question 8

Let the numbers be 24 and 240.
Then their H.C.F. = 24 and L.C.M. = 240.
Hence the required numbers are 24 and 240.

Test: Factors and Multiples- 2 - Question 9
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What is the sum of the first five multiples of 8?
Detailed Solution for Test: Factors and Multiples- 2 - Question 9

The sum of the first five multiples of 8 is 8 + 16 + 24 + 32 + 40 = 120.

Test: Factors and Multiples- 2 - Question 10
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Find the least 4−digit number that is divisible by 8.
Detailed Solution for Test: Factors and Multiples- 2 - Question 10

The least 4-digit number is1000, which is exactly divisible by 8 as 8 × 125 = 1000.

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