IIT JEE Exam Question:

3_3_3_3_3=31????

3/3+3^3+3=31
3/3=1
3^3=27
1+27+3=31

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Find Square root(2+Sqrt(2+Sqrt(2...	4 persons K L M N are initially at 4 corners of a square of side d. each person starts movin with uniform speed v such that K always moves directly towards L, L towards M, M towards N, and N towards K, at what time will they meet?