Question 2

Which number will replace the question mark (?) in the following series?
4, 16, 36, 64, 100, 144, 196, ?

Solution

4 + 12 = 16

16 + 20 = 36

36 + 28 = 64

64 + 36 = 100

100 + 44 = 144

144 +52 =196

196 + 60 =256

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