exam Maths Puzzle Numerical Ability

Two missiles are traveling toward each other, one at 9,000 mph, the other at 21,000 mph. They start 1317 miles apart. How far apart are they one minute before they collide?

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exam Other Question

It takes a computer 8 days to print all of the letters for a sweepstakes. A new computer is purchased that can do the same job in 5 days. How long would it take both computers working on it. 7 more than the product of 6 and a number