Math practice for 13 year olds - page 8 of 428
Number of problems found: 8555
- Customer 7
A customer wants a discount of 30% on the marked price. The dealer gives him two successive discounts of 20% and 12%. The discount was: (1) more than he wanted (2) the same as he wanted (3) less than he wanted (4) none of these Write the answer as a numbe - The supplement
The supplement of an angle is four times its complement. Find the angle. - Minimum interior angle
What is the minimum interior angle possible for a regular polygon? - Three cubes
Three cubes of iron whose edges are 6 cm, 8 cm, and 10 cm, respectively, are melted and formed into a single cube. Find the edge of the new cube. - Cement, sand, and gravel
Concrete tiles are made using buckets of cement, sand, and gravel mixed in a ratio of 1:4:6. How many buckets of gravel are needed for 4 buckets of cement? - One-third of the sum
A number equals 1/3 of the sum of 83.2, −25.1, and 65. What is the number? - Jeremy 2
Jeremy is digitally editing out some red-eye problems in photos from his sister's birthday party. The eyes are small and hard to click on, so he zooms in from 100% to 400%. In the zoomed-in photo, the eyes are 3 cm wide. How many cm wide were the eyes bef - An iron rod
If 22.5 meters of a uniform iron rod weighs 85.5 kg, what will the length of 22.8 kilograms of the same rod? - Single discount 3
What will be the single equivalent discount for successive discounts of 10%, 20%, and 15% on marked price? - Move the average
If the average of 5 numbers is 20, what number should be added to the first number to make the average 30? - Deli meat
Mrs. Matthews buys deli meat for her kids' lunches every week. This week, she buys 3.75 pounds of ham. How many sandwiches can she make if she uses 0.25 pounds of ham per sandwich? - Four fractions
There are four fractions: 5/8, 7/12, 1/3, and 2/5. Find the difference between the largest and the smallest fraction. - One half of students
There are 1200 students in the school. Of which 600 are girls. Find the percentage of boys. - Test and exam
1100 boys and 700 girls appeared in a test. If 42% of boys and 36% of girls passed, then find the percentage of students who failed. - A baker 6
A baker prepares a cake mix that weighs 120 pounds. The cake mix consists of 25 1/2 pounds of flour, 32 3/4 pounds of sugar, 20 3/8 pounds of milk, 15 pounds of whole eggs, and a total of 7 1/4 pounds of miscellaneous ingredients. The only other ingredien - A box of paisa
A box contains 261 coins valued at 20 paisa, 25 paisa, and 50 paisa. Their total values in rupees are in the ratio 7:8:10. Find the number of 25 paisa coins. (Note: 1 Rupee = 100 Paise.) - South and then east
William walks 16 m south from his house and turns east to walk 63 m to reach his friend's house. While returning, he walks diagonally from his friend's house to reach back to his house. What distance did he walk while returning? - A circular track
The inner circumference of a circular track is 220 m, and the width of the track is 7 m. Calculate the cost of putting up a fence along the outer circle at the rate of 50 USD/m. - Temperature bellow zero
At 3 PM, the temperature was 12 °F. It then began dropping 2 °F every hour for 7 hours. What was the temperature after 7 hours? - Average age 4
The average age of 31 people in a group is 19. If the group is reduced by one person to 30, the average age becomes 18. Find the age of the person who left.
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