HCF of 3 and 5 is 15.

True

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False

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Solution

The correct option is B False

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Question 3

HCF of co-prime numbers 4 and 15 was found as follows by factorization: $4 = 2 \times 2$ and $15 = 3 \times 5$ . Since there is no common prime factor, so HCF of 4 and 15 is 0. Is the answer correct? If not, what is the correct HCF?

HCF of co-prime numbers 4 and 15 was found as follows by factorization:

4 = 2 × 2 and 15 = 3 × 5 since there is no common prime factors, so HCF of 4 and 15 is 0. Is the answer correct? If not, what is the correct HCF?

HCF of co-prime numbers $4$ and $15$ was found as follows by factorisation: $4 = 2 \times 2$ and $15 = 3 \times 5$ since there is no common prime factor, so HCF of $4$ and $15$ is $0$ . Is the answer correct? If not, what is the correct HCF?

Q. Find the ratio between LCM and HCF of 5, 15 and 20.

Q. The numbers

525

and

3000

are both divisible only by

3, 5, 15, 25

and

75

. What is

H C F

(525, 3000) .

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