Question

What should be added to 8400 to get perfect square make me understand in simpleway

Answer 1

Answer:

64

Step-by-step explanation:

We know that,

90 * 90 = 8100

91 * 91 = 8281

92 * 92 = 8464

8400 is in between the squares of the numbers 91 and 92.

But 91 * 91 is less than 8400 and hence cannot be the closest number as we are being asked to add sum number to get a perfect square. (Note: Had the question been subtract some number to get a perfect square we could have gone with 91*91.)

so it should be closer to 92.

consider ,  

(92 * 92) - 8400 = 8464 - 8400 = 64

Therefore, the least number is 64 which must be added to 8400 to get the perfect square.