Continuing an arithmetic sequence

Difficulty Stretch · Set rfdbs9

Fill in what you can and press Check. Nothing you type is sent anywhere.

1
What comes next? 179, 185, 191, 197, 203, …
2
What comes next? 182, 187, 192, 197, 202, …
3
What comes next? 18, 27, 36, 45, 54, …
4
What comes next? 99, 108, 117, 126, 135, …
5
What comes next? 191, 198, 205, 212, 219, …
6
What comes next? 73, 77, 81, 85, 89, …
7
What comes next? 79, 84, 89, 94, 99, …
8
What comes next? 46, 54, 62, 70, 78, …
9
What comes next? 49, 56, 63, 70, 77, …
10
What comes next? 108, 99, 90, 81, 72, …
11
What comes next? 199, 205, 211, 217, 223, …
12
What comes next? 69, 77, 85, 93, 101, …
13
What comes next? 22, 24, 26, 28, 30, …
14
What comes next? 178, 187, 196, 205, 214, …
15
What comes next? 68, 71, 74, 77, 80, …
16
What comes next? 185, 191, 197, 203, 209, …
17
What comes next? 187, 194, 201, 208, 215, …
18
What comes next? 78, 69, 60, 51, 42, …
19
What comes next? 7, 10, 13, 16, 19, …
20
What comes next? 27, 23, 19, 15, 11, …

What is in this set

The numbers in this set run from 2 to 237.
Every problem in it will step by a constant amount.
25% of them run downwards.
A careful solution takes 2 written steps on average.
The mistake this set invites most often, in 75% of the problems: the terms were doubled.
Answers are a whole number.

Drawing 240 problems from this page produced 231 different ones, 96% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 4 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.