If the three digit number B9A is a perfect square, find, A-B

If the three digit number B9A is a perfect square, find, A-B

If the three digit number B9A is a perfect square, find, A-B ?

(a)          6

(b)          7

(c)           5

(d)          9

Sol:

142=196

A=6

B=1

A-B=5

quantitative aptitude
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