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Answer: 4
Mini Cross-number
Age 11 to 14
ShortChallenge Level 
Answer: 4
1$^3$=1, 2$^3$=8, 3$^3$=27, 4$^3$=64, 5$^3$ is more than 100
1 across is 27 or 64
| 1 across | 1 down | 3 across |
|---|---|---|
| 27 | 26 | 64 |
| 64 | 63 | no cube begins with 3 |
This problem is taken from the UKMT Mathematical Challenges.
You can find more short problems, arranged by curriculum topic, in our short problems collection.
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