book Maths Puzzle Numerical Ability

2 consecutive 4 digit number that has a sum of 9137.

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book Other Question

The sum of m and n, divided by the difference of m and n A boat has a cruzing speed of 14.1 mph in still water. A boat can cover 86.5 mile traveling with the stream. In the same time it cover 54.5 miles traveling against the stream, in t