Step by step
The question
Question: what comes next?
3, 7, 11, 15, □.
3, 7, 11, 15, □
1 Find the jumps
2 Find the rule
Every jump is the same: +4.
The rule is: add 4 each time.
= Rule: add 4 each time
3 Use the rule
The number before the box is 15.
15 + 4 = 19.
15 + 4 = 19
So the next number is 19.
= 3, 7, 11, 15, 19
4 Check
We go one jump back.
19 − 4 is 15.
Yes!
It works.
19 − 4 = 15
Let's look back.
First: find the jumps.
Then: find the rule.
Then: use the rule.
Last: check.
Answer
= 3, 7, 11, 15, 19