Question: Susan has 21 cats and Bob has 3 cats. If Susan gives Robert 4 of her cats, how many more cats does Susan have than Bob?
Answer: After giving away four of her cats, Susan has 21 - 4 = 17. Susan has 17 - 3 = 14 more cats than Bob. The answer is 14.

Question: Five shirts together cost $85. Of the 5 shirts, there are 3 shirts that cost $15 each. If the remaining shirts are each equal in value, what is the cost, in dollars, of one of the remaining shirts?
Answer: The first 3 shirts cost 15 * 3 = 45 dollars in total. There are 5 - 3 = 2 shirts remaining. The remaining 2 shirts cost 85 - 45 = 40 dollars in total. One of the remaining shirts costs 40 / 2 = 20 dollars. The answer is 20.

Question: Kirill is 14 less centimeters in height than his brother. Together their heights equal 112 centimeters. How tall is Kirill in centimeters?
Answer: Let B = brother's height in cm. Kirill = B - 14. 2B - 14 = 112 cm. 2B = 126. B = 63 cm. Kirill = 63 - 14 = 49 cm. Kirill is 49 centimeters tall. The answer is 49.

Question: Tyson can swim at a speed of 3 miles per hour in a lake and 2.5 mph in an ocean. This season, half his races happened in lakes and half his races happened in the ocean. He had ten total races, each of which was 3 miles long. How much time did he spend in his races?
Answer:
He did 5 races in the lake because 10 / 2 = 5. He did 5 races in the ocean because 10 / 2 = 5. He raced 15 miles in the lake because 5 x 3 = 15. His lake races took 6 hours because 15 / 2.5 = 6. He raced 15 miles in the ocean because 5 x 3 = 15. His ocean races took 5 hours because 15 / 3 = 5. He spent 11 hours racing because 5 + 6 = 11. The answer is 11.