Numerical sequences
To find the missing numbers in the sequence, we must identify the rule by which they change.
The sequence starts at 8 and then decreases by 1, therefore, the second term is 7. The third term increases by 4 units with respect to the second, going from 7 to 11, and the fourth decreases again by 1, now remaining at 10.
The fifth term increases again by 4 units, from 10 to 14. This already gives us a clear idea of the rule that the sequence follows.
Decrease 1, increase 4, decrease 1, increase 4,…
₊₄ ₊₄
8 , 7, 11, 10, 14,...,
⁻¹ ⁻¹ ⁻¹
In this way, the sixth element must decrease by 1, that is 13 and the seventh must increase by 4, that is 17.
8, 7, 11, 10, 14, 13, 17,…
The next numbers that the numerical sequence are 13 and 17, to complete. ✅