self Maths Puzzle


The total age of some 7 years old and some 5 years old children is 60 years. If I have to select a team from these children such that their total age is 48 years, In how many ways can it be done?

A.

3

B.

2

C.

1

D.

4

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self Other Question

The sequences x1,x2 ... and y1,y2 … are in arithmetic progressions such that x1+y1=100 and x22−x21=y99−y100. Find the sum of the first 100 terms of the progression,(x1+y1),(x2+y2) ? Abhishek had a certain number of Re1 coins, Rs 2 coins and Rs 10 coins. If the number of Re 1 coins he had is six times the number of Rs 2 coins Abhishek had, and the total worth of his coins is Rs 160, find the maximum number of Rs 10 coins Abhishek could have had