exam Maths Puzzle Numerical Ability

Bob was born 2 years after Clark and 2 years before Henry. In 1951, after all three of them had their birthdays, the sum of their ages was 144. In what years were they born?

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exam Other Question

Lost again on a worksheet. The question is:
A vat contains 100 gallons of a 50% brine solution. What is the greatest amount of water that can be added if the salt content cannot drop below 25%. Factor Completely

1. 3x^-2x-8

2. 24x^+10x-4

(include the check of your answer using multiplication)(suppose to be factoring the polynomials)

3.2(x+y)^(2)+(x+y)-3