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.
Level 1 · Warm-up
1 Which is smaller, −4 or 2?
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−4 is on the left of zero, so it is smaller than 2.
2 Which symbol makes this true: −9 ? −5 (write < or >)
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−9 is further left than −5, so −9 < −5.
3 Which is the largest of −3, −8 and −1?
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−1 is closest to zero, so it is the largest of the three.
Level 2 · Core
4 Put 2, −5, 0 and −1 in ascending order (smallest first, separated by commas).
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Reading the line left to right gives −5, −1, 0, 2.
5 Which symbol makes this true: −12 ? −20 (write < or >)
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−20 is further left, so −12 is the greater number: −12 > −20.
6 Three mornings were −6 °C, −15 °C and −2 °C. Which was the warmest?
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−2 °C is the closest to zero, so it is the largest and the warmest.
Level 3 · Challenge
7 Put −3, 7, −10, 0 and 4 in descending order (largest first, separated by commas).
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Ascending gives −10, −3, 0, 4, 7, so descending is 7, 4, 0, −3, −10.
8 Name the integer that lies between −8 and −6.
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Walking right from −8 you reach −7 before −6.
9 Four overnight lows were −1 °C, −9 °C, 5 °C and −4 °C. Which was the SECOND coldest?
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Coldest first gives −9, −4, −1, 5, so the second coldest is −4 °C.