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Which of the ...

Question

Which of the following is a Ramanujan number ?

A

4103

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B

4104

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C

4105

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D

4106

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Solution

The correct option is B $4104$
$4104 = 16^{3} + 2^{3} = 15^{3} + 9^{3}$
It can be expressed as sum of two cubes in $2$ different ways.

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