Question 30
Select the number from among the given options that can replace the question mark (?) in the following series.
31, 41, 55, 73, 95, ?
Solution
In given series there is a difference of 4 digits for example
$$41-31=\ 10$$
$$55-41=\ 14$$
$$73-55=\ 18$$
$$95-73=\ 22$$
$$121-95=\ 26$$
So hence option A is the correct answer
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