Step by step
The question
Question: what comes next?
5, 10, 15, 20, □.
5, 10, 15, 20, □
1 Find the jumps
2 Find the rule
Every jump is the same: +5.
The rule is: add 5 each time.
= Rule: add 5 each time
3 Use the rule
The number before the box is 20.
20 + 5 = 25.
20 + 5 = 25
So the next number is 25.
= 5, 10, 15, 20, 25
4 Check
We go one jump back.
25 − 5 is 20.
Yes!
It works.
25 − 5 = 20
Let's look back.
First: find the jumps.
Then: find the rule.
Then: use the rule.
Last: check.
Answer
= 5, 10, 15, 20, 25