Question

Exercise 3.4
1. Find HCF by common division method.
a) 16, 42, 72
b) 99,33, 121​

Answer 1

Answer:

Step 1: Divide the largest number by the smallest number. Step 2: Take divisor as new dividend and remainder as the new divisor, i.e. divide the first divisor by the first remainder. Step 3: Proceed till the remainder is zero and the last divisor will be the HCF of the given numbers. Therefore, HCF of 24 and 15 is 3.

Answer 2

The correct answer is 33..

Refer to the attachment for details..

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