L2 EAL Unit 003 Revision

Convert 3/4 to a decimal.

• 0.25

• 0.5

• 0.75

• 1.25

Answer explanation

To convert 3/4 to a decimal, divide 3 by 4. This results in 0.75, which is the correct answer. The other options do not represent the fraction 3/4.

Convert 0.2 to a fraction.

• 1/4

• 1/5

• 2/5

• 1/2

Answer explanation

To convert 0.2 to a fraction, recognize that 0.2 is equivalent to 2/10. Simplifying 2/10 by dividing both the numerator and denominator by 2 gives 1/5. Therefore, the correct answer is 1/5.

What is 7.89 rounded to one decimal place?

• 7.8

• 7.9

• 8.0

• 7.85

If V = IR and I = 5, R = 10, what is V?

• 50

• 15

• 5

• 10

Answer explanation

Using the formula V = IR, substitute I = 5 and R = 10. Thus, V = 5 * 10 = 50. Therefore, the correct answer is 50.

If A = πr² and r = 3, what is A (use π ≈ 3.14)?

• 28.26

• 31.40

• 18.84

• 9.42

Answer explanation

To find A, use the formula A = πr². Substituting r = 3 and π ≈ 3.14, we get A = 3.14 * (3)² = 3.14 * 9 = 28.26. Thus, the correct answer is 28.26.

What is the median of the set {3, 5, 7, 9, 11}?

• 5

• 7

• 9

• 11

Answer explanation

To find the median, arrange the numbers in order: {3, 5, 7, 9, 11}. The median is the middle number, which is 7 in this case.

What is the mode of the set {2, 4, 4, 6, 8}?

• 2

• 4

• 6

• 8

Answer explanation

The mode is the number that appears most frequently in a set. In the set {2, 4, 4, 6, 8}, the number 4 appears twice, more than any other number. Therefore, the mode is 4.

If the mean of {2, 4, 6, 8} is 5, what is the sum of the numbers?

• 16

• 18

• 20

• 22

Answer explanation

The mean is calculated as the sum of the numbers divided by the count. Here, the mean is 5 and there are 4 numbers. Thus, the sum is 5 * 4 = 20. Therefore, the correct answer is 20.

What is the ratio of 4 to 8?

• 1:2

• 1:4

• 2:1

• 2:3

Answer explanation

The ratio of 4 to 8 can be simplified by dividing both numbers by their greatest common divisor, which is 4. Thus, 4 ÷ 4 = 1 and 8 ÷ 4 = 2, resulting in a simplified ratio of 1:2.

What is 25% of 200?

• 25

• 50

• 75

• 100

Answer explanation

To find 25% of 200, multiply 200 by 0.25. This gives 200 * 0.25 = 50. Therefore, the correct answer is 50.