[Question]Djibo is 17 years old. Five years ago Djibo added his age with his sister's age and the sum was 35. How many years old is Djibo's sister today?
[Answer]Age 5 years ago: 17 - 5 = 12. Sister's age 5 years ago: 35 - 12 = 23. Sister's age today: 23 + 5 = 28 years. Djibo's sister is 28 years old today. The answer is 28.

[Question]A dental office gives away 2 toothbrushes to every patient who visits. His 8 hour days are packed and each visit takes .5 hours. How many toothbrushes does he give in a 5 day work week?
[Answer]Each day he does 8 / .5 = 16 visits. So he does 16 * 5 = 80 visits a week. That means he gives away 80 * 2 = 160 toothbrushes a week. The answer is 160.

[Question]Gail has two fish tanks. The first tank is twice the size of the second tank. There are 48 gallons of water in the first tank. She follows the rule of one gallon of water per inch of fish. If she keeps two-inch fish in the second tank and three-inch fish in the first tank, how many more fish would Gail have in the first tank than the second tank if one of the first tank fish eats another?
[Answer]The second tank is 48 / 2 = 24 gallons. Following her rule, Gail keeps 24 / 2 = 12 two - inch fish in the second tank. She keeps 48 / 3 = 16 fish in the first tank. If one fish in the first tank ate another, she would have 16 - 1 = 15 fish in the first tank. Thus, Gail would have 15 - 12 = 3 more fish in the first tank. The answer is 3.

[Question]Bill is doing weight training before trying out for the boxing team. He gets two 2-gallon jugs and fills them 70% full with sand. If sand has a density of 5 pounds/gallon, how many pounds do Bill's improvised weights weigh?
[Answer]
First find the volume of the sand in one jug: 2 gallons * 70% = 1.4 gallons. Then double this amount since there are two jugs: 1.4 gallons * 2 = 2.8 gallons. Then multiply the total volume by the density of sand to find the total weight: 2.8 gallons * 5 pounds / gallon = 14 pounds. The answer is 14.