Roy is now 4 years older than Erik and half of that amount older than Iris. If in 2 years, Roy will be twice as old as Erik, then in 2 years what would be Roy’s age multiplied by Iris’s age?
Answer(s): C
Translate piece by piece into numbers. R (Roy) = Erik E. + 4. The second equation: R = I (Iris) + 2. The third equation: R +7 = 2(E + 7). We have three equations with three variables.Roy is 6, Iris is 4 and Erik is 2. In four years Erik would be 6 and Iris 8, the answer is 48. The correct answer is C.
An investment yields an interest payment of $228 each month. If the simple annual interest rate is 9%, what is the amount of the investment?
Answer(s): B
Principal × percent interest × time = interest earned Principle × (0.09) × 1/12 = $228.Solve to find the principal (228 × 12)/0.09= $30,400. The correct answer is B.
X, Y, Z, and W are integers. The expression X-Y-Z is even and the Expression Y-Z-W is odd. If X is even what must be true?
The first expression is even and the second is odd, the only difference between the expressions is that the first expression has X and the second has W. So, if X is even W must be odd and the correct answer is C.
Q is a prime number bigger than 10. What is the smallest positive number (except 1) that 3Q can be divided by equally?
3Q is a prime number so it can be divide equally by 3Q, by 1 and by the components 3 and Q. The smallest number therefore is 3. The correct answer is C.
In a box there are green balls, 3A + 6 red balls and 2 yellow ones.If there are no other colors, what is the probability of taking out a green or a yellow ball?
Answer(s): D
The number of green and yellow balls in the box is A+2. The total number of balls is 4A +8. The probability of taking out a green or a yellow ball is: A + 2 / 4 A + 8 = 1/4
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