exam Maths Puzzle Numerical Ability

The sum of two numbers is 42. Their difference is 6. What are the two numbers?

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exam Other Question

The number of dustballs under my son's bed doubles everyday. If the area becomes full on february 5th, on what date was the the area under the bed empty? A mutual fund has 14 stocks in its portfolio. On a given day 2 stocks move up, 9 stay the same and 3 move down. In how many ways can this happen?