Question

The highest common factor (HCF) of 42 and 70 is the square root of a number. What is the number?

Answer 1

49

Explanation:

42 = 2 x 3 x 7
70 = 2 x 5 x 7

common factor toh 2 bhi hai but highest pucha hai isiliye 7.

Highest common factor = 7

Now , A/c;

`7 = √(x)\\ 7^(2) = x\\ x = 49`