Medium
Find the missing term in the number series: 3, 7, 16, 35, (?)
Explanation
Explanation
Each term is formed as: previous term x2, plus an increasing number (1, 2, 3, 4...). 3x2+1=7, 7x2+2=16, 16x2+3=35, 35x2+4=74. So the missing term is 74.
PRO TIP
Re-check your working by substituting the answer back into the original question.