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Primary 5 Mathematics · Patterns and unknown values

Name: ______________________

Date: ____________

1. What is the rule for this pattern? 7, 13, 19, 25, …
- ☐ (a) Add 6
- ☐ (b) Add 7
- ☐ (c) Multiply by 2
- ☐ (d) Subtract 6
2. What is the next term in this pattern? 2, 6, 18, 54, …
- ☐ (a) 108
- ☐ (b) 162
- ☐ (c) 72
- ☐ (d) 158
3. Find the unknown value: ? × 8 = 72.
- ☐ (a) 8
- ☐ (b) 9
- ☐ (c) 7
- ☐ (d) 64
4. Which number makes this number sentence true? 150 − ? = 85
- ☐ (a) 75
- ☐ (b) 65
- ☐ (c) 235
- ☐ (d) 55
5. Find the unknown value: ? ÷ 6 = 9.
6. A pattern starts at 3 and each term is multiplied by 2. What is the fifth term?
7. The rule is “multiply by 4, then subtract 1”. What is the output when the input is 7?
8. Mia has some stickers. She gives away 15 and has 38 left. How many stickers did she have to start with?

Answer sheet

1. Add 6 — Each term is 6 more than the one before: 7 + 6 = 13, 13 + 6 = 19, 19 + 6 = 25.
2. 162 — The rule is multiply by 3. 54 × 3 = 162.
3. 9 — 72 ÷ 8 = 9. Check: 9 × 8 = 72.
4. 65 — 150 − 85 = 65. Check: 150 − 65 = 85.
5. 54 — Undo dividing by multiplying: 9 × 6 = 54. Check: 54 ÷ 6 = 9.
6. 48 — The terms are 3, 6, 12, 24, 48. The fifth term is 48.
7. 27 — 7 × 4 = 28, then 28 − 1 = 27.
8. 53 — The number sentence is ? − 15 = 38. Undo the subtraction: 38 + 15 = 53.