Question

$25434961$

Answer 1

Here the rule which is applicable on the series: 25 43 49 61 is Rule D. Multiply the number by 3 and subtract 5 from the result as:
10 X 3 - 5 = 25
16 X 3 - 5 = 43
18 X 3 - 5 = 54 and
22 X 3 - 5 = 61
Hence, Rule (D) is the correct answer.