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

The pattern in the series is as follows:\ \[\n7 \times 4 - 1 = 27\n\]\ \[\n27 \times 4 - 1 = 107\n\]\ \[\n107 \times 4 - 1 = 427\n\]\ \[\n427 \times 4 - 1 = 1707\n\]\ The next number in the series is 1707, hence option D is the correct answer.