A student finishes half of an exam in 2/3 of the time it takes him to finish the 2nd half. If the entire exam takes him an hour, how many minutes does he spend on the first ½ of the exam?

Mindy’s average monthly salary for the first 4 months she worked was $300. What must her average salary for the next 8 months be so that her average monthly salary for the year is $350?

Andrew drove 100 miles at an average speed of 50 mph He then increased his speed by 20% and drove another 30 miles. What was the average speed for the entire journey?

Joe makes lemonade by mixing 2/3 of a cup of mix with 2 quarts of water. How many cups of mix would he need to mix with 11 quarts of water?

4/7 of professors are male. The ratio of tenured: untenured is 2:5. If 1/5 of male professors are tenured, what fraction of female professors are untenured?

An oculist charges $30 for an eye exam, frames, and glass lenses, but $42 for an eye exam, frames, and plastic lenses. If plastic lenses cost four times as much as glass lenses, how much do glass lenses cost?

A team won 45% of the first 80 games played. How many of the remaining 82 games will the team have to win in order to win 50% of all games it played?

If increasing 20 by P percent gives the same result as decreasing 60 by P percent, what is P percent of 70?

In the sequence (4,12,36,x,324), what is the most likely value of x?

The number that is 400% greater than 15 is what percent greater than 150% of 30?