# Which number comes next in this series: 5, 7, 11, 19, 35, ?

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• 67.

5 is increased by 2 to get 7

7 is increased by 2*2 to get 11

11 is increased by 222 to get 19

19 is increased by 222*2 to get 35

35 will increases by 22222 to get 67

• 67

• The next number is anything you want. I found that series in a book I have, and the next number was 44.9831. But in a different book, the next number was 95.

• 67

• 67

• 11 is 5 times 2 minus 3.

19 is 11 times 2 minus 3.

therefore the numbers in the sequence are double the last number minus three, so 35 x 2 – 3 = 67

the other answers are also correct in saying that the pattern is also the previous number plus the next power of 2 going up from the first.

• 67 going by logic

• a₁ = 5

a₂ = a₁ + 2

a₃ = a₂ + 4

a₄ = a₃ + 8

a₅ = a₄ + 16

a₆ = a₄ + 32 = 67

• The differences are

2^1 , 2^2 , 2^3 , 2^4

So the nest will be 2^5 = 32

35 + 32 = 67 (The next number).

• Just add the next power of 2.

5 + 2 = 7

7 + 4 = 11

11 + 8 = 19

19 + 16 = 35

35 + 32 = 67 