2, 6, 12, 20, 30, ?
💡 Hint
The gaps are 4, 6, 8, 10…
Reveal answer
42
Method 1: the differences between terms are 4, 6, 8 and 10, growing by 2 each time. The next gap is 12, so 30 + 12 = 42. Method 2: each term is a number multiplied by the next one: 1×2 = 2, 2×3 = 6, 3×4 = 12, 4×5 = 20, 5×6 = 30, so the next term is 6×7 = 42. Both methods give the same answer, which is a good sign you have found the real rule.
Did you get it?
About This Puzzle
Number sequences are a staple of brain training because there is always a rule hiding behind the numbers. This one has a rule that you can spot in two different ways.
How to Think About It
Start by looking at the gaps between the numbers instead of the numbers themselves. Write the differences under the sequence. If the gaps follow a simple pattern, you can extend them by one step and add.
🔢 Up nextThe Route 66 Missing Dollar Puzzle→