What number should appear next in this sequence? 

3    6    7    20    11    42    15    72    19    ? 

Answer: 110. (1+2, 2x3, 3+4, 4x5, 5 + 6 etc.)  

If you enjoyed solving this puzzle question, apply for a Mensa Home Test?

Mensa Brainteaser Answers

Train Your Brain?