Question

Q22: The least number which must be subtracted from

6156 to make its perfect square is

a) 72

b) 82

c) 52

d) 62

​

Answer 1

First we will find the square root of 6156:

6156

=

2×2×3×3×3×3×19

=2×3×3×

19

=18×4.358=78.444...

Now, we find the square of 78 as follows:

78

2

=78×78=6084

Let us now subtract 6156 from 6084 as shown below:

6156−6084=72

Hence, 72 will be subtracted from 6156 to make it a perfect square.

Hope it helps...

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Answer 2

Answer:

72

Step-by-step explanation:

6156-72 = 6084

6084 is the square of 78