its the Fibonacci sequence
Chat with our AI personalities
The spacing is 6 1+6=7 7+6=13 13+6=19 19+6=25 so the missing number in the sequence is 13
Fibonacci sequence Fibonacci sequence
8 and 34 Alterative answer: Convensionally, the Fibonacci sequence starts with two 1s. So 1 and 8 are missing.
arithmetic
The pattern is plus 7. So the next number used to be 1.