Mental Maths Class 5 Knowing Our Numbers

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

If the HCF of two numbers is 7, which of the following must be true?

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A One number divides the other
B Both are divisible by 7
C Both are prime
D Both are equal

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Answer: B. Both are divisible by 7

HCF is the highest common factor, so 7 is a factor of both numbers. Both numbers must be divisible by 7.

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If the HCF of two numbers is 7, which of the following must be true?

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