Easy
In the number series, one term is missing. Find the missing term: 7, 15, 31, 63, 127, (?)
Explanation
Explanation
Each term is obtained by multiplying the previous term by 2 and adding 1. Thus, 127 × 2 + 1 = 255.
PRO TIP
Re-check your working by substituting the answer back into the original question.