Question: The sum of the ages of three boys is 29. If two of the boys are the same age and the third boy is 11 years old, how old are the other two boys?
Answer with step-by-step thinking: The third boy is 11 so the sum of the ages of the first two is 29 - 11 = 18. The ages of the first two boys are equal so each of them is 18 / 2 = 9 years.
So the answer is 9.

Question: Every time Janet folds her blanket its thickness doubles. If it starts out 3 inches thick, how thick will it be after 4 foldings?
Answer with step-by-step thinking: First find how thick the blanket will be after 1 folding: 3 inches * 2 = 6 inches. Then find how thick the blanket will be after 2 foldings: 6 inches * 2 = 12 inches. Then find how thick the blanket will be after 3 foldings: 12 inches * 2 = 24 inches. Then find how thick the blanket will be after 4 foldings: 24 inches * 2 = 48 inches.
So the answer is 48.

Question: If Lucy would give Linda $5, Lucy would have the same amount of money as Linda. If Lucy originally had $20, how much money did Linda have at the beginning?
Answer with step-by-step thinking:
After giving $5, Lucy has $20 - $5 = $15 left. Since Linda has $15 after receiving $5, then she had $15 - $5 = $10 at the beginning.
So the answer is 10.