Instructions

In the following number series only one number is wrong. Find the wrong number.

Question 115

3 4 12 45 198 1005 6066

Solution

3*1 + 1 = 4
4*2 + 4 = 12
12*3 + 9 = 36 + 9 = 45
45*4 +16 = 196.
Hence, 198 is the wrong term. Option E is the right answer.

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