The first clock shows when a movie started and the second shows when it finished. How many minutes did it take?
Q3 · 热身 · Money and time: cents, coins, clocks and elapsed time · 所填答案：A (160) · C (80)
错在哪一步： 160 is what comes out of treating an hour as 100 minutes instead of 60. Jump to the next full hour, count the whole hours, then add the last minutes.
Pat has the digit cards 6, 7, 9. Using every card exactly once she makes a single 3-digit number. What is the difference between the largest and smallest numbers she can make?
Q4 · 热身 · Place value: building the biggest or smallest number · 正确
✓
The pictograph shows the number of players for each child. Each full symbol stands for 4 players; a half symbol stands for 2. How many players were there for Ben?
Q5 · 进阶 · Data and chance: graphs, pictographs and spinners · 正确
✓
Nia is exactly in the middle of a queue. Raf is 7 places behind Nia, and there are 8 people behind Raf. How many people are in the queue?
Q6 · 进阶 · Counting the ways: cases and combinations · 正确
✗
4 tickets cost $19. How many dollars do 20 tickets cost?
Q7 · 进阶 · Working backwards and sharing in ratio · 所填答案：A (35) · D (95)
错在哪一步： 35 is what comes out of adding the difference instead of multiplying by the scale factor. Ask how many times bigger the new amount is, then multiply by that.
Lights are placed 4 m apart all the way around a triangular garden with sides 12 m, 40 m and 36 m, with a light at each corner. How many lights are needed?
Q8 · 进阶 · Shapes and area · 正确
✓
Priya spends her prize money in three stages: first she spends 1/2 of it, then 1/5 of what is left, then 1/3 of what is left. She now has $16. How many dollars was the prize?
Q9 · 挑战 · Working backwards and sharing in ratio · 正确
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What is the smallest three-digit number that is odd, a multiple of 3, contains the digit 8, has no digit 0, and has all different digits?
Q10 · 挑战 · Number clues: digit puzzles and divisibility · 所填答案：192 · 183
At noon, 6 lights all flash at the same moment. After that they flash every 5, 4, 9, 8, 4 and 9 seconds respectively. How many seconds after noon do all 6 lights next flash together?
Q11 · 挑战 · Patterns that repeat: cycles and step rules · 正确
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Three different numbers are chosen from the list 3, 5, 7, ..., 105 and added together. How many different totals are possible?
Q12 · 挑战 · Counting the ways: cases and combinations · 未作答 · 148
Number clues: digit puzzles and divisibility原因待查（本次测试作答 1 题，答对 0 题；做错：Q10）
multiples, factors and remainders
digit rules: even/odd, digit sums, 'contains the digit'
finding the smallest number that fits several clues at once
sharing with none (or the same number) left over: the least common multiple
Money and time: cents, coins, clocks and elapsed time待复查（本次测试作答 1 题，答对 0 题；做错：Q3）
错在哪一步： 160 is what comes out of treating an hour as 100 minutes instead of 60. Jump to the next full hour, count the whole hours, then add the last minutes.
coin totals in cents
change from a note
unit price
minutes between two clock times
Working backwards and sharing in ratio待复查（本次测试作答 2 题，答对 1 题；做错：Q7）
错在哪一步： 35 is what comes out of adding the difference instead of multiplying by the scale factor. Ask how many times bigger the new amount is, then multiply by that.
undoing a chain of steps from the end
fractions of a whole and what is left
sharing in a ratio; scaling a recipe or price
two-weighing problems (compare, then subtract)
目前已答对的技能：Shapes and area（2/2）、Space: cubes, nets, views and routes（1/1）、Place value: building the biggest or smallest number（1/1）、Data and chance: graphs, pictographs and spinners（1/1）、Counting the ways: cases and combinations（1/1；Q12 未作答）、Patterns that repeat: cycles and step rules（1/1）。每个技能只考了一到两道题 —— 这是证据，还不代表已经掌握。学习计划会用新题对这些技能逐一重新检测。