exam Maths Puzzle Numerical Ability

If tbone can paint a car in 4 hours and walker texas ranger can paint the same car in 6 hours, how long will it take them to paint the car together?

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exam Other Question

The product of two positive integers is 98. If they differ by 7, what are the integer?
Please help.
Sketch the graph of a function for which the domain is all values of X and the rang is -2 < y < 2.