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Question
Using the method of successive subtraction examine whether or not the following numbers is perfect cube 792 .
Sum
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Solution
We have:
792
1
791
7
784
19
765
37
728
61
667
91
576
127
449
169
280
217
63
∵ The next number to be subtracted is 271, which is greater than 63.
∴ 792 is not a perfect cube.
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