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Maths Puzzle
Numerical Ability
A collection of nickels, dimes and quarters has a value of $7.50. If there are 3 fewer dimes than nickels and twice as many quarters as nickels, how many dimes are there?
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book Other Question
Intersections and Unions
If p={-3,-2,0,1,5}
T={0,1,6,9}
and S={-3,1,6}
find T U S
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Mrs.Ellis is setting up an annuity for her retirement. She can set aside $2,000 at the end of the year for the next twenty years and it will earn 6% annual interest. What lump sum