What is the missing figure in the series? 48, 45, 40, 33, 24, _____?

What is the missing figure in the series? 48, 45, 40, 33, 24, _____?

Explanation

48 → 45 (−3)

45 → 40 (−5)

40 → 33 (−7)

33 → 24 (−9)

Now continue the pattern: next difference should be −11

24 − 11 = 13