After taking several practice tests, Brian improved the results of his GRE test by 30%. Given that the first time he took the test Brian had answered 150 questions correctly, how many correct answers did he answer in the second test?
A number is increased by 2 and then multiplied by 3. The result is 24. What is this number?
My father’s age divided by 5 is equal to my brother’s age divided by 3. My brother is 3 years older than me. My father’s age is 3 less than 2 times my age. How old is my father?
(x – 2) / 4 – (3x + 5) / 7 = – 3, x = ?
1 / (1 + 1 / (1 – 1/x)) = 4, x = ?