Question

Complete the series: \[ 7, 27, 107, 427, \, ? \]

Hint:

When you encounter such series, look for a consistent relationship like multiplication and addition/subtraction to find the next term.

Answer 1

Observe the pattern in the series: \[ 7 \times 4 - 1 = 27 \] \[ 27 \times 4 - 1 = 107 \] \[ 107 \times 4 - 1 = 427 \] \[ 427 \times 4 - 1 = 1707 \] Thus, the next number in the series is 1707. Therefore, the correct answer is option D.