The teacher gave this pattern to the class: the first term is 5 and the rule is add 4, subtract 1. Each student says one number. The first student says 5. Victor is tenth in line. What number should Victor say?

1 Answer
Sep 22, 2016

Each student says the number that is 33 above the previous answer.

Explanation:

If the the first term is 55, then the first student will say 88.
Student 22 : 1111
3 4 5 6 7 8 9
14 17 20 23 26 29 32

and the 10th10th student, Victor, will say 35

There is a simpler way that works with even larger numbers far faster.

Take "n" to be the number in line the student is.
The students number is 3n + 5

Victor would say (3 xx 10) + 5(3×10)+5 which is 3535

The 100th100th student would say 305305 (3 xx 100) + 5(3×100)+5