MBA Exam

Let Sm denote the sum of the cubes of first m natural numbers. For How many values of m<=50,is Sm a multiple of 5?

1) 20
2) 21
3) 22
4) 23

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MBA Other Question

A positive whole number M less than 100 is represented in base 2 base 3 base 5 notation.it is found that in all 3 cases the last digit is 1.while in exactly two out of the three cases the leading digit is 1 then M equals

1) 31
2) 63
3) 75
4) 91
5) none of these
PQ is a chord of 6cmof a circle of radius of 5cm.Tangents to circle at P and Q meet at T..find lenght of TP...plz explain also

1) 4.75
2) 2.75
3) 3.75
4) 4.24