Directions: Pick the correct options from below.
27.5, 65, 126.5, 218, 345.5.....?
Show answer & explanation
Correct answer: C
Explanation
Series = 27.5, 65, 126.5, 218, 345.5, ?
65 − 27.5 = 37.5
126.5 − 65 = 61.5
218 − 126.5 = 91.5
345.5 − 218 = 127.5
Difference Series:
37.5, 61.5, 91.5, 127.5
Differences:
61.5 − 37.5 = 24
91.5 − 61.5 = 30
127.5 − 91.5 = 36
They are increasing by 6.
Next difference = 36 + 6 = 42
So next principal difference = 127.5 + 42 = 169.5
Now next term = 345.5 + 169.5 = 515