Work through the levels in order. Type your answer and press Check — open the worked solution if you get stuck. Answers like -6, 3/4 or 0.25 are typed exactly as shown. A ⭐ Bonus Challenge at the end is extra credit — skip it if the rest was hard work.
Level 1 · Warm-up
1 Mean of 4, 6 and 8?
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18 ÷ 3 = 6.
2 A graph counts by 5s. A bar reaches 3 gridlines high. Its value?
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3 × 5 = 15.
3 Three kids average 4 stickers. Total stickers?
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3 × 4 = 12.
Level 2 · Core
4 Mean of 12, 15, 9, 8?
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44 ÷ 4 = 11.
5 Bars: 18, 22, 30. Claim: "the third bar is 12 more than the first." True or false?
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30 − 18 = 12 → true.
6 Team A total: 40. Team B has 33 with one game left. Minimum to BEAT Team A?
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Needs 41 → 41 − 33 = 8.
Level 3 · Challenge
7 Four numbers average 9. Three of them are 8, 11 and 7. The fourth?
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36 − 26 = 10.
8 Bars: 16, 24, 8. Claim: "the second is exactly 3 times the third." True or false?
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24 = 3 × 8 → true.
9 After 4 tests Maya averages 6. What must she score on test 5 to average 7 overall?
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Now: 24. Needs 5 × 7 = 35 → 11.