Question

By what number must 20 be divided to become a perfect square?​

Answer 1

Step-by-step explanation:

We are going to find prime factors of 1656216562=7×2366 =7×7×338 =7×7×2×169 =7×7×13×13×2Now, we are going to make a group of equal number. =(7×7)×(13×13)×2By observation, 2 prime factor left out.So, divide by 2 we get,16562÷2= (7×7)×(13×13) =(7×13)×(7×13) =91×91 =(91) 2 ⇒ 8281=(91) 2 ∴ To make perfect square we have to divide 16562 by 2.

Answer 2

17,18,19,20 these r the numbers