# TACHS Math : Solving multi-step problems

## Example Questions

### Example Question #41 : Tachs: Math And Ability

The first 60 miles of a 100-mile trip took one hour; the whole trip took two hours and fifteen minutes. To the nearest whole, what was the average speed during the remaining 40 miles of the trip?

40 miles per hour

50 miles per hour

36 miles per hour

32 miles per hour

32 miles per hour

Explanation:

The average speed during a trip of miles over a period of hours is miles per hour. Here, the distance driven is 40 miles; the time it took was two hours and fifteen minutes total minus the hour for the first 40 miles, which is one hour and fifteen minutes. Since fifteen minutes is equal to

hours, we get

and

Therefore, the average speed traveled during the second part of the trip is

miles per hour.

### Example Question #1 : Word Problems

Jeremy has  pieces of candy. Maggie has half as many pieces of candy as Jeremy has, and Harold has twice as many pieces of candy as Jeremy and Maggie combined. How many pieces of candy does Harold have?

Explanation:

Start by finding how many pieces of candy Maggie has. Since she has half as many as Jeremy, she must have  pieces. Then, Jeremy and Maggie have  pieces of candy together. Since Harold has twice as many as the two of them together, Harold must have  pieces of candy.

### Example Question #1 : Word Problems

Taylor is  years old. Her father is three times her age. Her mother is two years older than her father. What is the sum of the ages of Taylor, her father, and her mother?

Explanation:

Start by multiplying Taylor's age by  to find her father's age.

Her father must be  years old. Since her mother is two years older than her father, her mother must be  years old.

Now, add up all their ages to find the sum of their ages.

### Example Question #1 : Word Problems

When Steve started his diet, he weighed  pounds. After the first month, he lost  of his weight. In his second month, he lost  of the remaining weight. How many pounds does Steve weigh now?

Explanation:

Start by finding how much weight Steve lost after the first month. Since he lost  of his starting weight of , he must have lost  pounds.

This means that at the end of his first month, he weighed  pounds.

Since he lost  of his remaining weight in the second month, he must have lost  pounds from his  pounds.

Thus, Steve must weigh  pounds now.

### Example Question #2 : Word Problems

A school library uses shelves that can hold  books. If they have  shelves that are completely full and one shelf that is only  full, how many books does the library have?