Question Bank - General Aptitude

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If ? ÷ ? = 2; ? ÷ ? = 3; ? + ? = 5; ? × ? = 10,Then the value of (? - ?)2, is

A.
0
B.
1
C.
4
D.
16

Solution:

Explanation:Given:? ÷ ? = 2, ? × ? = 10, ? + ? = 5; ? × ? = 10? \(\frac{?}{?} = 2\), \(\frac{?}{?} = 3\)? \(\frac{? }{?}=\frac{3}{2}\) \(?=\frac{3?}{2}\)now, ? + ? = 5 \(\frac{3?}{2} + ? = 5 \)5? = 10? ? = 2? ? + 2 = 5 ? ? = 3Now, ? × ? = 102 × ? = 10? ? = 5Now, \(\frac{?}{?} = 2\)\(\frac{?}{3} = 2\)? ? = 6Hence (? - ?)2 = (5 - 6)2 = 1

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