Multiple choice

Find the missing number in the given series. 5, 7, 11, 19, ______, 67, 131

  1. 35

  2. 43

  3. 47

  4. 31
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The differences between consecutive terms are: 7-5=2, 11-7=4, 19-11=8. The differences are powers of 2. The next difference should be 16. 19 + 16 = 35. Checking: 35 + 32 = 67, 67 + 64 = 131. The pattern holds.

AI explanation

The differences between consecutive terms double each time: 7 - 5 = 2 and 11 - 7 = 4. The next difference is 19 - 11 = 8, so the following difference must be 16. Adding 16 to 19 gives the missing term as 35, which is confirmed by adding 32 to get 67 and 64 to get 131.

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