you are told that 1331 is a perfect cube. Can you guess without factorisation what is its cube roote?
adi4565:
naah i can,t
1331 is cube of 11 without factorisation it can be done by marking from 1st group of last three digits and 2nd group of left digits by looking at 1st group's unit's digit we can guess the unit digit of square root and now check the 2nd group it is greater than or less than whose cube? We can compare and got to know about it.
what i do
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