Multiple choice Find the wrong number in the following number series? 87, 88, 92, 102, 117, 142 88 102 87 92 142 Reveal answer Fill a bubble to check yourself B Correct answer Explanation The pattern is: add consecutive squares starting from 1: 87+1²=88, 88+2²=92, 92+3²=101 (not 102), 101+4²=117, 117+5²=142. So 102 is wrong - should be 101.