Step-by-step reasoning process: Tony's age now is 24 / 2 = 12 years old. In 6 years he will be 12 + 6 = 18 years old.
[Q & A] The question is Jacob is 24 years now. His brother Tony is half Jacob's age. In 6 years how old will tony be?
The answer is 18

Step-by-step reasoning process: If Matthews has 60 cows, Aaron has 4 * 60 = 240 cows. Together, Aaron and Matthews have 240 + 60 = 300 cows. Since Marovich has 30 fewer cows than the combined number of cows that Aaron and Matthews have, Marovich has 300 - 30 = 270 cows. Altogether, the three have 270 + 300 = 570 cows.
[Q & A] The question is Aaron has four times as many cows as does Matthews. Together, they have 30 more cows than Marovich. If Matthews has 60 cows, how many cows do the three have altogether?
The answer is 570

Step-by-step reasoning process: The school bought 2 x 2 = 4 dinosaur models for the elementary library. So the school bought a total of 2 + 4 = 6 models. The price of each model was reduced by $100 x 5 / 100 = $5. Thus, each model cost $100 - $5 = $95. Therefore, the school paid a total of $95 x 6 = $570.
[Q & A] The question is The Science museum sells dinosaur models for $100 each. A certain school bought 2 models for the kindergarten library and also bought twice as many for the elementary library. Since the school bought more than 5 models, there was a 5% reduction in price for each model. How much did the school pay in all?
The answer is 570

Step-by-step reasoning process: The fixer used 30 / 100 * 400 = 120 nails to fix the kitchen. The number of nails remaining in the container after he fixes the kitchen is 400 - 120 = 280. He also uses 70 / 100 * 280 = 196 of the nails remaining in the container to fix the fence. The total number of nails which the fixer hasn't used is 280 - 196 = 84.
[Q & A]
The question is A fixer uses 30% of the nails in a container to repair the kitchen. He also used 70% of the remaining nails in the container to repair the fence. If there were 400 nails in the container, how many nails are remaining?
The answer is 84