Question

3:16::7:? a)49 b)52 c)64 d)73

Answer 1

64........ 3*(3+5)+1=7.
7*(7+2)+1=64

Answer 2

We have:

3 : 16 : : 7 : ?

We have to find, the value of missing number (?) = ?

Solution:

The pattern follow:

x : $(x+1)^{2}$

3 : 16 = 3 : $(3+1)^{2}$

3 : 16

Similarly,

7 : ?

? = $(7+1)^{2}$

= $8^{2}$ = 8 × 8

= 64

∴ Missing number (?) = 64

Thus, the required "option c) 64" is correct.