Practice Test Discussion

What approximate value should come in place of the question mark (?) in the given questions?

$\sqrt{4556} + \sqrt{7943} - 56=?$

[Andhra Bank (PO), 2008]

100

150

200

250

125

Explanation

Given,

$\sqrt{4556} + \sqrt{7943} - 56=?$

It can be approximated as

$\sqrt{4900} + \sqrt{7900} - 56=?$

= 70+90-56 [ nearest perfect square]

= 160-56

= 104 ≈ 100

Hence, Option A is correct.

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