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Originally Posted by scorer
2^6 - 1 is the shortest way, though understanding the mechanics is important.
Total Combinations = nCr.
Where n = 6.
r = 1..6. (no zero because, atleast one question has to be solved)
so 6C1+6C2+...+6C6 = 63.
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Thank you Scorer!!!
It is much, much clear now
