If the difference between the radii of two circles is 10 cm, what is the difference between their circumferences

What is the least number of consecutive positive integers, that add up to 1000?

What is the seventh number in the sequence 1, 2, 5, 10, 17, . . .?

Vince is twice his sister’s age who is 8 years old. Their mother’s age is twice the sum of their ages. How old is their mother?

The digits of the number 4765 can be rearranged to form different numbers. What is the sum of the largest and smallest of these numbers?

A triangle has sides of length 6 cm, 10 cm, and 11 cm. An equilateral triangle has the same perimeter. What is the length of each side of the equilateral triangle?

On a test consisting of 30 questions, Sue had 50% more right answers than she had wrong answers. Each answer was either right or wrong. How many questions did she answer correctly?

How many edges are there on a triangular-based prism?

A rope of length 64 meters is cut into three pieces. The second piece is three times as long as the first, and the third is four times as long as the second. How long is the shortest piece?

A rectangular box has dimensions 9 cm by 6 cm by 24 m. A second rectangular box has volume one half of the first and has a base 6 cm by 4 cm. What is the height of the second box?

A rectangular box has dimensions 9 cm by 6 cm by 24 m. A second rectangular box has volume one half of the first and has a base 6 cm by 4 cm. What is the height of the second box?

If −2 is substituted for x in the expression x 3 − 4x 2 − kx − 20, the result is 0. What is the value of k?

If a 3 meter post casts a shadow 7 decimeters long, what is the height of a tree, in meters, that casts a shadow 63 decimeters long?

A baseball team won 50 out of the 75 games that they have played and still has 45 games to play this season. How many of the remaining games must it win in order that its percentage of games won for the entire season will be 60%?

Ana, Beth, and Cora run at constant rates. In a race of 1000 meters, Ana finished 200 meters ahead of Beth and 400 meters ahead of Cora. When Beth finished, how many meters was she ahead of Cora?

A drain can empty a full bathtub in 15 minutes. If the drain is completely sealed, a faucet can fill an empty tub in 12 minutes. How long will it take for the faucet to fill the bathtub if the drain is open?

Dan has P1000. He bought a polo shirt for ₧395. He also bought an undershirt. Then, he had P 375.50 left. How much did he pay for the pants?