Math Quiz

You buy 15 apples for $3.75. What is the cost of one apple?

• $0.10

• $0.25

• $0.50

• $0.75

Answer explanation

To find the cost of one apple, divide the total cost ($3.75) by the number of apples (15). $3.75 / 15 = $0.25, so the cost of one apple is $0.25.

Solve for x in the equation 2x−5=15

• 5

• 7

• 10

• 12

Answer explanation

To solve for x, add 5 to both sides of the equation to isolate x. 2x = 20. Then, divide by 2 to find x = 10, which is the correct answer choice.

If the perimeter of a square is 32 meters, what is the length of one side of the square?

• 6 meters

• 7 meters

• 8 meters

• 9 meters

Answer explanation

Since the perimeter of a square is the sum of all four sides, each side would be 32 meters divided by 4, which equals 8 meters. Therefore, the length of one side of the square is 8 meters.

What is the value of 8y if y=9

• 56

• 64

• 72

• 80

Answer explanation

To find the value of 8y when y=9, simply multiply 8 by 9 which equals 72. Therefore, the correct answer is 72.

A train covers 120 miles in 3 hours. At the same speed, how far will the train travel in 5 hours?

• 100 miles

• 160 miles

• 200 miles

• 240 miles

Answer explanation

At the same speed, the train will travel 200 miles in 5 hours (120 miles in 3 hours means 40 miles per hour, so 40 miles/hour * 5 hours = 200 miles).

A recipe calls for 2 cups of flour for every 3 cups of sugar. If you use 9 cups of sugar, how much flour is needed?

• 4 cups

• 5 cups

• 6 cups

• 7 cups

Answer explanation

For every 3 cups of sugar, 2 cups of flour are needed. Since 9 cups of sugar are used, 6 cups of flour are needed (9 cups of sugar / 3 cups of sugar = 3, 3 x 2 cups of flour = 6 cups of flour). Therefore, the correct answer is 6 cups.

The area of a triangle is given by 1/2 × base × height. If the base is 14 cm and the area is 70 cm², what is the height?

• 8 cm

• 9 cm

• 10 cm

• 11 cm

Answer explanation

To find the height, use the formula for the area of a triangle: 1/2 × base × height = area. Substituting the values, 1/2 × 14 cm × height = 70 cm². Solving for height gives height = 10 cm.

If 6 workers can complete a job in 8 days, how many days would it take 4 workers to complete the same job, assuming they work at the same rate?

• 10 days

• 12 days

• 14 days

• 16 days

Answer explanation

If 6 workers can complete the job in 8 days, then the total work is 6*8 = 48 worker-days. To complete the same job with 4 workers, it would take 48/4 = 12 days.

If a car travels 300 kilometers in 5 hours, what is its average speed in kilometers per hour?

• 50 km/h

• 55 km/h

• 60 km/h

• 65 km/h

Answer explanation

To find the average speed, divide the total distance by the total time: 300 km / 5 hours = 60 km/h. Therefore, the correct answer is 60 km/h.

If 5 pencils cost $1.25, what is the cost of one pencil?

• $0.15

• $0.20

• $0.25

• $0.30

Answer explanation

To find the cost of one pencil, divide the total cost by the number of pencils. $1.25 / 5 pencils = $0.25 per pencil. Therefore, the cost of one pencil is $0.25.