| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.31 |
| Score | 0% | 66% |
Find the average of the following numbers: 16, 14, 19, 11.
| 17 | |
| 15 | |
| 19 | |
| 16 |
To find the average of these 4 numbers add them together then divide by 4:
\( \frac{16 + 14 + 19 + 11}{4} \) = \( \frac{60}{4} \) = 15
If there were a total of 450 raffle tickets sold and you bought 22 tickets, what's the probability that you'll win the raffle?
| 6% | |
| 11% | |
| 5% | |
| 1% |
You have 22 out of the total of 450 raffle tickets sold so you have a (\( \frac{22}{450} \)) x 100 = \( \frac{22 \times 100}{450} \) = \( \frac{2200}{450} \) = 5% chance to win the raffle.
What is 8x7 x x7?
| 8x14 | |
| 9x14 | |
| 9x49 | |
| 8x49 |
To multiply terms with exponents, the base of both exponents must be the same. In this case they are so multiply the coefficients and add the exponents:
8x7 x x7
(8 x 1)x(7 + 7)
8x14
How many 2 gallon cans worth of fuel would you need to pour into an empty 12 gallon tank to fill it exactly halfway?
| 6 | |
| 3 | |
| 4 | |
| 7 |
To fill a 12 gallon tank exactly halfway you'll need 6 gallons of fuel. Each fuel can holds 2 gallons so:
cans = \( \frac{6 \text{ gallons}}{2 \text{ gallons}} \) = 3
Which of the following is an improper fraction?
\(1 {2 \over 5} \) |
|
\({7 \over 5} \) |
|
\({a \over 5} \) |
|
\({2 \over 5} \) |
A rational number (or fraction) is represented as a ratio between two integers, a and b, and has the form \({a \over b}\) where a is the numerator and b is the denominator. An improper fraction (\({5 \over 3} \)) has a numerator with a greater absolute value than the denominator and can be converted into a mixed number (\(1 {2 \over 3} \)) which has a whole number part and a fractional part.