Janet starts driving across a lake in a speedboat going 30 miles per hour. Her sister follows in a sailboat that has a speed of 12 miles per hour. If the lake is 60 miles wide, how long does Janet have to wait on the other side for her sister to catch up?
Let's think: First find how long it takes Janet to cross the lake: 60 miles / 30 miles / hour = 2 hours. Then find how long it takes her sister to cross the lake: 60 miles / 12 miles / hour = 5 hours. Then subtract Janet's travel time from her sister's travel time to find the difference: 5 hours - 2 hours = 3 hours.. The answer is: 3.

Every year, Tabitha adds a new color to her hair. She started this tradition when she was 15 years old, which was the year she added her second hair color. In three years, Tabitha will have 8 different colors in the hair. Currently, how old is Tabitha?
Let's think: Since, three years from now, Tabitha will have 8 different colors in her hair, this year she has 8 - 3 = 5 colors in her hair. Since she had 2 colors in her hair at the age of 15, she has added 5 - 2 = 3 colors since she was 15 years old. Since she ads one color per year, 3 added colors = 3 added years. Thus, currently, she is 15 + 3 = 18 years old.. The answer is: 18.

There are 4 alligators living on a golf course in Florida. If the number of alligators doubles every six months, how many alligators will there be at the end of a year?
Let's think: First figure out how many times the alligator population doubles in one year by dividing the number of months in a year by the number of months it takes the population to double: 12 months / 6 months = 2. The alligator population doubles twice. Now double the alligator population once: 4 alligators * 2 = 8 alligators. Now double it again: 8 alligators * 2 = 16 alligators.. The answer is: 16.

There were 349 pieces of candy in a bowl. Talitha took 108 pieces and Solomon took 153 pieces. How many pieces of candy remain in the bowl?
Let's think:
349 - 108 = 241 and 241 - 153 = 88. There are 88 pieces of candy left in the bowl.. The answer is: 88.