Answer the following question.
Mona bikes 30 miles each week to stay fit. This week, she biked on Monday, Wednesday, and Saturday. On Wednesday, she biked 12 miles. On Saturday, she biked twice as far as on Monday. How many miles did she bike on Monday?
Step-by-step reasoning process: Let M be the number of miles Mona biked on Monday. Thus, Mona biked 2M miles on Saturday. In all, Mona biked M + 2M + 12 = 30 miles. Thus, on Monday and Saturday, she biked M + 2M = 3M = 30 - 12 = 18 miles. Therefore, on Monday, Mona biked M = 18 / 3 = 6 miles.
The answer is 6.

Answer the following question.
Martine has 6 more than twice as many peaches as Benjy. Benjy has one-third as many peaches as Gabrielle. If Martine has 16 peaches, how many does Gabrielle have?
Step-by-step reasoning process: Benjy has b peaches. Martine has 6 + 2b = 16 peaches. 2b = 10. b = 5. Then Gabrielle has 5 * 3 = 15.
The answer is 15.

Answer the following question.
Mrs. Young buys a 300 piece puzzle set for her three sons. She divides the pieces evenly to the three boys. Reyn can place 25 pieces into the puzzle picture. Rhys places twice as much as Reyn. Rory places three times as much as Reyn. Altogether, how many puzzle pieces are still left to be placed?
Step-by-step reasoning process: Each son receives 300 / 3 = 100 pieces. Rhys places 25 x 2 = 50 pieces. Rory places 25 x 3 = 75 pieces. All three boys place 25 + 50 + 75 = 150 pieces. The boys have not placed 300 - 150 = 150 pieces.
The answer is 150.

Answer the following question.
In Fifi's closet, she hangs all of her clothes on colored plastic hangers. She has clothes hanging on 7 pink hangers, 4 green hangers, one less blue hanger than there are green hangers, and one less yellow hanger than there are blue hangers. What is the total number of colored hangers in Fifi's closet?
Step-by-step reasoning process: With 4 green hangers, 1 less blue hanger than there are green hangers is 4 - 1 = 3 blue hangers. With 3 blue hangers, 1 less yellow hanger less than there are blue hangers is 3 - 1 = 2 yellow hangers. With 7 pink hangers, the total number of colored hangers in Fifi's closet is 7 + 4 + 3 + 2 = 16 hangers.
The answer is 16.