Question

Find the least number which must be added to 8400 to obtain a perfect square, find the
square root of the number so obtained. ​

Answer 1

Answer:

least number is 21, the square root of the number is 420

Step-by-step explanation:

Factorization of 8400=$3*4^{2}*5^{2}*7$

Perfect square number=$3^{2}*4^{2}*5^{2}*7^{2}$

Hence least number to be added is

$3*7\\=21$

The perfect square number would be 3*4*5*7=420

Answer 2

Answer:

= 64 is the least number. Therefore, the least number is 64 which must be added to 8400 to get the perfect square. Thus, the square root of the number 8464 is 92.