Riddles Random Riddle: The Missing Number November 12, 2023October 12, 2023 gags Can you discover the missing number in this series? 37, 10, 82 29, 11, 47 96, 15, 87 42, ?, 15 Show answer The missing number is 6. The number in the middle of each triple is the same as the digits of either end’s number when added together. 3+7=10=8+2 and so on.