exam Maths Puzzle Numerical Ability

If a Home Depot worker can paint a house in 4 hours, and a Lowes worker can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

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exam Other Question

Everyone shook hands at a party. There were 190 handshakes in all. How many were at the party? (From Algebra by Keedy, Bittinger, Sith and Orfan, p. 221)
I think I can get the a lad carries a load of 12.5 kilograms.he finds it heavy so he removes a weight of 3.86 kilograms.what is the remaining load?