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Question
Using the method of successive subtraction examine whether or not the following numbers is perfect cube 345 .
Sum
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Solution
We have:
345
1
344
7
337
19
318
37
281
61
220
91
129
127
2
∵ The next number to be subtracted is 161, which is greater than 2.
∴ 345 is not a perfect cube.
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