Question

What should come in the place of question mark(?) in the given series ? 4 6 10 18 34 ?

• A. 67
• B. 65
• C. 68
• D. 66

Answer 1

Answer:

D. 66

Series: 4, 6, 10, 18, 34, ? ### Step 1: Find the differences 6 − 4 = 2 10 − 6 = 4 18 − 10 = 8 34 − 18 = 16 The differences are doubling each time: 2, 4, 8, 16 So the next difference will be: 16 × 2 = 32 34 + 32 = 66