The square root of 23 is between which two groups of numbers?

4 and 5
2 and 3
6 and 7

Answer: 4 and 5

What is the maximum number of 45-degree angles that a triangle can have?

Answer: 2

Susan has taken 4 of the 5 GED tests. Her scores were 410,440,500, and 480. In order to obtain the necessary 2250 points to get her GED, what would she need to get on her fifth test?

solution: Susan needs to get a 420 on her fifth test.

Which of the following is the equation of a line that contains the point with the corrdinates (1,4)?

a.2x - y = 1
b.2x - y-=-3
c.2x - y = -2

answer: (c) 2(1) - 4 = -2

What is the volume, in cubic feet, of a rectangular solid that measures 4 feet long, 3 1/2 feet wide, and 2 feet high?

Solution: formula: volume = length x width x height
4 x 2 x 3 1/2 = 28 cubic feet

Solve for x.


3x + 6 -21 = 2x - 4

Solution: x = 10

Understanding how to arrange decimals is an important skill for the GED Math Student. Can you determine....

Which of the following decimals is the smallest?

4.0, 0.4. 4.4, -4.0, -0.4. -4.4

Answer: -4.4

Do you understand the number pattern for Pascual's Triangle? If you don't, you are not alone. Up until now, every time I saw it... I had to think about it. And then, I still may not have figured it out... or should I say remembered what the pattern was.

That is, up until now.

The pattern: Each number is just the two numbers above it, added together.

Can you figure out what the next row will be?

GED Math Help: percents

To rent a hall for a party reception (for 1 evening) costs $225. The Hall is also charging $25.50 per adult and $19.95 per child for the meal and reception. Gratuity is 15% of total costs. If 125 adults and 32 children attending the party, what is the total cost.... including gratuity?

Answer: Set up the problem as follows:

First part: (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
Second part: 15% of (cost of hall + (cost of adult meal)(number of adults attending)+ (cost of child meal)(number of children attending)
.
Find the answers to part one and two, and then add them together.
.
Part one- hall and meals: $225 + (125 x $25.50) + (32 x $19.95) = $4050.90.
Part two- gratutity: .15 x $4050.90 = $607.34
.
Total cost: $4050.90 + $607.34 = $4658.24

Have you recently held a reception? How did you calculate costs?

Did you know.....

• is, is equal to, equals, the same MEANS =
  
• of, the product, times, multiple, multiplied by MEANS x or ∙
  
• add, more than, plus, sum, increased by, added to, more MEANS +
  
• subtract, less than, minus, difference, decreased by, less MEANS -
  
• divide, divided by, the quotient MEANS ÷
  
• double, twice, twice as much MEANS 2x or 2 ∙
  
• half, half of, half as much MEANS ½ x or ½ ∙
  

A great math dictionary to use for preparing for the GED test is Usborne Illustrated Math Dictionary. It is a great bargain and less than $15.

GED Skill: Simple Interest

Pamela is taking out a car loan for $12,500 at 6.75% interest for 7 years. How much interest will she pay and how much will her monthly payments be ?
Answer: To find out how much interest Pamela will pay, use the simple interest formula of principal x interest x time: $12,000 x .0675 x 7 = $5670. WOW that's a lot!

To find out how much her monthly payments will be, add the principal and interest ($12,000 + $5670 = $17,670) and divide it by the total months (12 months x 7 years = 84). Finally, divide $17,670 and 84. The monthly payment will be $210.36.

GED Skill: geometry

Dan is planning on on re carpeting his master bedroom, measuring 15ft by 25ft. He is looking at carpeting which costs $9 per square yard. He also has a budget of $300. Assuming that there will be a 10% waste, will Dan have enough money. If not, how much short is he?

Answer: Dan does not have enough money. He is short by about $112.5

Percents: GED Skill

Karen bought a new sweater for 20% off the original price. If the original price was $49.99 and sales tax is 5.5%, how much did Karen spend on her new sweater?

Answer: First you need to find the actual cost of the sweater (original price minus the 20% off). Take $49.99 x .2 which equals $9.99. $49.99 - $9.99= $40.00 (cost of sweater on sale). Second you need to calculate sales tax (5.5%) on $40.00. Take $40.00 x .055 which equals $2.20.

Finally, you need to add the cost of the sweater, $40.00, and the cost of the sales tax, $2.20 together. $40.00 + $2.20 = $42.20

The answer is $42.20.

There are other ways to also solve this problem. Leave a comment on how YOU would solve this problem.

GED Skill: percents

75% of the third grade passed their spelling test. If there are 24 children in the third grade, how many did not pass the spelling test?

answer: 6 children did not pass the spelling test.