Question 3
Which number will replace the question mark (?) in the following series?
5, 12, 26, 54, ?
Solution
The logic here is
12 - 5 = 7
26 - 12 = 14
54 - 26 = 28
The difference between consecutive numbers in the series is twice the previous difference. The next difference will be 56.
Let the required number = a
Similarly,
a - 54 = 56
$$\Rightarrow$$ a = 110
$$\therefore\ $$The required number = 110
Hence, the correct answer is Option C
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