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Question

What is the value of ___ for the Ramanujan number: ___ +543=383+483?

A
10
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B
20
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C
30
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D
40
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Solution

The correct option is C 20
Ramanujan number is the number expressible as the sum of two cubes in two different ways.
So,
203+543=383+483
8000+157464=54872+110592
165464=165464
So, the missing number is 20.

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