Find the missing number in the given series following the same pattern:

21, 13, 40, -24, 101, (?)

21, 13, 40, -24, 101, (?)

Logic: The difference is cube of the number in increasing order.

13 - 21 = -8 (-2³)
40 - 13 = 27 (3³)
-24 - 40 = -64 (-4³)
101 - (-24) = 101 + 24 = 125 (5³)

The next difference in the sequence should be (−6)³ = −216:

Next term = 101+(−216) = 101−216 = −115

So, -115 is next term.

Thus, the correct answer is (d).