exam Maths Puzzle Numerical Ability

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#1. Leaking Faucet-A faucet is leaking at a rate of one drop of water per second. If the volume of one drop of water is 0.1 cubic centimeter (0.1

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A purse has P218 in P10, P5, and P1 Coins. There are 46 coins in all and there are 4 more P5 coins than the P10 coins. How many of each kind of coin are there?? hope you can help me... how many permutations are there of the letters in the word "distinction"?