What approximate value should come in place of question mark (?) in the following questions ?(You are not expected to calculate the exact value)
$$(56)^{2}\times2.5385=?$$
The problems can be solved more quickly by approximating as answer given in options are differing substantially.
We can approximate 56~55, 2.538~2.5.
Now, 55^2= 3025.
55^2 of 2.538 = 3025*2.5= 7562. 7960 is nearest option to this.
Hence, option D is correct.
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