Multiplying number patterns, step by step
Some sequences do not add the same amount — they multiply by it, so they grow fast.
The question
1, ?, 9, 27
1?927
1?927
1?927
13927
- Find the rule first, from two numbers you can actually see — never from the gap.
- 9 to 27 is × 3. One pair is only a guess — the number after the gap will confirm it.
- Now apply it to the gap: 1 × 3 = 3.
- Check it against the number already after the gap: 3 × 3 = 9, which is what is there. The missing number is 3.
How it works.
- 01
Find the rule first, from two numbers you can actually see — never from the gap.
- 02
9 to 27 is × 3. One pair is only a guess — the number after the gap will confirm it.
- 03
Now apply it to the gap: 1 × 3 = 3.
- 04
Check it against the number already after the gap: 3 × 3 = 9, which is what is there. The missing number is 3.