Factors · Multiples · 2.1

What is a multiple?

A multiple of a number is what you get by multiplying it by 1, 2, 3, … The multiples of 4 are 4, 8, 12, 16, … — it’s just skip-counting by 4.

01 / THE IDEA

See it work.

Skip-counting

Multiples of 4.

Count up by 4 — every highlighted square is a multiple.

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Watch the method

What is a multiple?

Multiples of 4: 4, 8, 12, 16, …

1 / 1
44
1

Skip-count

Count up by 4.

4,  8,  12,  16,  20,  24,  …4,\; 8,\; 12,\; 16,\; 20,\; 24,\; \dots
02 / YOUR TURN

Practice until it feels automatic.

Your turn

Work it out.

Type a list, e.g. 1, 2, 3, 6.

streak 0
best 0
… =
— / WHY IT WORKS

The idea underneath.

Times a whole number

The multiples of n are n×1, n×2, n×3, …; they go on forever.

Why it works

Skip-count by 4.

03 / WORKED EXAMPLES

From easy to tricky.

EX 1easy

List the first six multiples of 6.

1

Skip-count

Count up by 6. 6, 12, 18, 24, 30, 36, …

EX 2medium

List the first six multiples of 6.

1

Skip-count

Count up by 6. 6, 12, 18, 24, 30, 36, …

EX 3hard

List the first six multiples of 9.

1

Skip-count

Count up by 9. 9, 18, 27, 36, 45, 54, …

04 / COMMON TRAPS

Where students slip.

Trap

Confusing a multiple with a factor.

Fix

Multiples are bigger (or equal); factors divide in.

Trap

Starting at 0 or 2×.

Fix

Start at the number itself (×1).

05 / QUIZ

Test yourself.

The Test

12 problems across three tiers. Auto-graded on submit. Hints and a full walkthrough on every question. Your work is saved on this device — sign in to keep it across devices.

0/12Answered
How to answerType just the value. Formatting won't trip you up — we ignore spaces, capital letters, commas, and subscript style, so t₁ = 5, d = 3 and t1=5,d=3 both count. For a list of numbers, separate them with commas (e.g. 3, 10, 17).
Core

Core (4)

C1

List the first six multiples of 9.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
C2

List the first six multiples of 6.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
C3

List the first six multiples of 9.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
C4

List the first six multiples of 5.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
Apply

Apply (4)

A1

List the first six multiples of 8.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
A2

List the first six multiples of 5.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
A3

List the first six multiples of 4.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
A4

List the first six multiples of 3.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
Extension

Extension (4)

E1

List the first six multiples of 3.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
E2

List the first six multiples of 6.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
E3

List the first six multiples of 2.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.
E4

List the first six multiples of 12.

Need a hint?
  • Skip-count by the number.
  • Each step adds the number.