Maths · Multiples
Pop the Number
Pop every multiple of 7. Leave the impostors floating.
Free to use and free to share. There is no sign-up, no score, and nothing a child does here is recorded or sent anywhere. What you may do with it, in full.
Loading the interactive exercise. Nothing you do here is saved or scored.
Why this works
Multiples of 7 have no neat digit trick, unlike 2, 5 or 10, so this one is pure recall plus a check. Run up the table in steps of 7 and see whether your number appears: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70. If it does not appear, it is not a multiple, however close it looks. The traps here were 27 (just under 28), 40 (between 35 and 42), 44 (between 42 and 49) and 54 (between 49 and 56). When you are unsure, find the nearest multiple you do know and count on in sevens from there.
Helping a child through Pop the Number
Hints, least revealing first
- Say the seven times table under your breath: 7, 14, 21, 28, 35, 42, 49, 56, 63, 70.
- A number is a multiple of 7 only if 7 divides into it with nothing left over.
- Watch out for the near misses. 27, 40, 44 and 54 all sit between two multiples of 7 without being one.
When they finish it: “Every seven popped!”
11+ skill this exercise practises
It has its own page, with a worked example on it.
All maths 11+ skillsYou can reuse this. Here is exactly how far that goes
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Pop the Number practises one skill. Maths has 55 of them
A free diagnostic covers every maths skill and the other three subjects, and comes back with a shortlist rather than a list.