GED Math Test #9

Question 1

A town's population grows by 15% and 20% during the course of two years. After two years, what percentage of the population has grown?

Accepted Answer

38%

Answer

The population has grown by 15% and 20%, respectively.
The population grows by 15%, bringing it to 115 percent of its initial size.
Multiply the figure by 120 percent for the second increase.
138 percent (1.15)(1.20)=1.38 percent
After two years, the population has expanded by 38%.

Question 2

Mr. Frank puts aside $2,500 of his $55,000 monthly family income. What percentage of his income does he set aside for savings?

Accepted Answer

1/22

Answer

2,500 out of 55,000 equals to 2500/5500 = 25/550 = 1/22

Question 3

The average of five numbers in a row is 38. What is the smallest number?

Accepted Answer

36

Answer

Let 𝑥 be the smallest number. Then, these are the numbers:
𝑥,𝑥+1,𝑥+2,𝑥+3,𝑥+4
𝑎𝑣𝑒𝑟𝑎𝑔𝑒=𝑠𝑢𝑚𝑜𝑓𝑡𝑒𝑟𝑚𝑠𝑛𝑢𝑚𝑏𝑒𝑟𝑜𝑓𝑡𝑒𝑟𝑚𝑠⇒38=𝑥+(𝑥+1)+(𝑥+2)+(𝑥+3)+(𝑥+4)5⇒38=5𝑥+105⇒190=5𝑥+10⇒180=5𝑥⇒𝑥=36

Question 4

The number 83 is 5 less than twice a positive integer. What is the value of the integer?

Accepted Answer

44

Answer

Let 𝑥 be the integer. Then:
2𝑥–5=83
Add 5 both sides: 2𝑥=88
Divide both sides by2:𝑥=44

Question 5

One-fifth of a supplement equals an angle. What is the angle's measurement?

Accepted Answer

30

Answer

The total of the supplement angles is 180 degrees. Let's call that angle x.
As a result of x+5x=180
6x=180, divide both sides by 6:x=30.

GED Practice Test

GED Practice Test

GED Math Test #9