The average of 3 numbers is 7. If 2 of the numbers are zero, then what if the 3rd number?

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X, Y and Z can do a piece of work in 6 hours . X and Y can do the same work in 8 hours and Y and Z can do the same work in 12 hours. In how many times will X and Z do the same work?

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A batsman has a certain average of runs for 12 innings. In the 13th innings he scores 96 runs thereby increasing his average by 5 runs. What is his average after the 13 innings?

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If the numerator of a fraction is increased by 150% and the denominator of a fraction increased by 200% fraction becomes 10/19. Find the fraction.

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A number when divided by 627 leaves a remainder 43. By dividing the same number by 19, the remainder will be-

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