What number should replace the question mark in the given series? 5, 7, 11, 19, 35, 67, ?

The next number is 131.

The differences between terms double each time.

7-5=2, 11-7=4, 19-11=8, 35-19=16, 67-35=32.

The next difference is 32 x 2 = 64.

67 + 64 = 131.

Method: differences form a doubling pattern.