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In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives. 2 4 6 3
Question

In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.

2
4
6
3
5
7
13
41
?

A.

95

B.

91

C.

81

D.

85

Correct option is D

Logic: ​(Top number)2 + (Middle number)2 = Bottom number
Let's check:
Column 1: 22=4, 32=9
4 + 9 = 13 
Column 2: 42=16, 52=25
16+25=41
Column 3: 62= 36, 72 = 49
36 + 49 = 85
So, the missing number is: 85
Thus, the correct option is: (d)

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