[Question]Building A has 4 floors, which is 9 less than Building B. Building C has six less than five times as many floors as Building B. How many floors does Building C have?
[Answer]A = 4 floors. B = 4 + 9 = 13 floors. C = (13 * 5) - 6 = 59 floors. Building C has 59 floors. The answer is 59.

[Question]Ali turned 8 years old this year, and is now 3 years older than Yusaf. If Umar is twice Yusaf's age, how old is Umar?
[Answer]If Ali is 3 years older, then Yusaf must be 8 3 = 5 years old. Umar is twice Yusaf's age, so he must be 5 * 2 = 10 years old. The answer is 10.

[Question]Bob has planted corn in his garden, and it has just started to sprout. A week after planting it, it had grown 2 inches. The next week, its height increased by twice as much as it had the first week. In the third week, it grew 4 times as much as it did the week before. How tall are the corn plants now?
[Answer]The second week it grew twice as much as the first week, so 2 * 2 inches = 4 inches. The third week it grew 4 times as much as in the second week, so 4 * 4 inches = 16 inches. In total, it grew 2 inches + 4 inches + 16 inches = 22 inches. The answer is 22.

[Question]Devin teaches one math course per year. He taught Calculus for 4 years, Algebra for twice as many years, and Statistics for 5 times as long as he taught Algebra. How many years has Devin taught?
[Answer]
Calculus: 4 years. Algebra: 4(2) = 8 years. Statistics: 8(5) = 40 years. Total number of years taught: 4 + 8 + 40 = 52 years. The answer is 52.