Page 25 - 新思维数学活动用书6 样章
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2 Numbers and sequences
2.2 Special numbers
Worked example 2
Use each of the digits 1, 3, 4, 5, 6 and 8 once to make the cube number
following 2-digit numbers. square number
A square number
A cube number
A multiple of 5
A square number
6 4 A cube number The only possible cube number is 64.
5 A multiple of 5 5 must be in the ones place for the
multiple of 5.
Place these digits first.
8 1 A square number That leaves 1, 3 and 8.
Use 8 and 1 to make a square number
6 4 A cube number and put 3 in the tens place in the
multiple of 5.
3 5 A multiple of 5
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