We have a question: In 5 years, Nacho will be three times older than Divya. If Divya is currently 5 years old, what's the sum of their ages now?
And an answer: 40
So how you got the answer?
If Divya is currently 5 years old, she will be 5 + 5 = 10 years old in five years. Since in 5 years Nacho will be three times older than Divya, he will be 3 * 10 = 30 years older than Divya. Nacho's total age in five years will be 30 + 10 = 40 years. Currently, Nacho is 40 - 5 = 35 years old. The sum of Divya and Nacho's age now is 35 + 5 = 40 years.

We have a question: The sum of the three sides of a triangle is 50. The right side of the triangle is 2 cm longer than the left side. Find the value of the triangle base if the left side has a value of 12 cm.
And an answer: 24
So how you got the answer?
If the left side of the triangle is 12, and the right side is 2 cm longer, the right side is 12 + 2 = 14 cm long. The sum of the left and right sides of the triangle is 14 + 12 = 26 cm. If the sum of all sides of the is 50, and the left and right sides of the triangle are 26, the triangle base is 50 - 26 = 24 cm.

We have a question: On a farm, on average every 6 cows produce 108 liters of milk per week. In five weeks the cows produced 2160 liters of milk. How many cows are on the farm?
And an answer: 24
So how you got the answer?

Per week, one cow produces 108 liters / 6 cows = 18 liters / cow. The cows produced 2160 liters of milk over 5 weeks. So we have 2160 liters / 18 liters / cow = 120 cows. Further, we have to divide 120 cows / 5 weeks = 24 cows.