exam Maths Puzzle Numerical Ability

A projectile is launched upward at an initial velocity of 64 ft/sec from a platform. It took 8 sec to hit ground. How tall was the platform?

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Dick is now seven times as old as Harry. In six years Dick will be five times as old as Harry. How old will Harry be in 5 years? cashews sell for $8 a pound, and peanuts sell for $3 a pound. A store want to make 20 pounds of mixed nuts which they will sell for $6 a pound. How many pounds of cashews and how many poiunds of peanuts should they use?