| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.49 |
| Score | 0% | 70% |
What is the next number in this sequence: 1, 5, 9, 13, 17, __________ ?
| 18 | |
| 27 | |
| 21 | |
| 24 |
The equation for this sequence is:
an = an-1 + 4
where n is the term's order in the sequence, an is the value of the term, and an-1 is the value of the term before an. This makes the next number:
a6 = a5 + 4
a6 = 17 + 4
a6 = 21
Which of these numbers is a factor of 72?
| 54 | |
| 27 | |
| 9 | |
| 13 |
The factors of a number are all positive integers that divide evenly into the number. The factors of 72 are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72.
A menswear store is having a sale: "Buy one shirt at full price and get another shirt for 25% off." If Frank buys two shirts, each with a regular price of $44, how much will he pay for both shirts?
| $33.00 | |
| $50.60 | |
| $77.00 | |
| $11.00 |
By buying two shirts, Frank will save $44 x \( \frac{25}{100} \) = \( \frac{$44 x 25}{100} \) = \( \frac{$1100}{100} \) = $11.00 on the second shirt.
So, his total cost will be
$44.00 + ($44.00 - $11.00)
$44.00 + $33.00
$77.00
What is 8a4 - 7a4?
| 15a16 | |
| 15a-8 | |
| a4 | |
| a-4 |
To add or subtract terms with exponents, both the base and the exponent must be the same. In this case they are so subtract the coefficients and retain the base and exponent:
8a4 - 7a4
(8 - 7)a4
a4
Which of the following is not a prime number?
2 |
|
9 |
|
7 |
|
5 |
A prime number is an integer greater than 1 that has no factors other than 1 and itself. Examples of prime numbers include 2, 3, 5, 7, and 11.