[Question]: Patrick has 4 hours less than twice the amount of time that Greg has left to finish his homework. Greg has six hours less than Jacob left to finish his homework. If Jacob has 18 hours left to finish his homework, calculate the total number of hours they all have left to finish their homework?
[Answer]: If Jacob has 18 hours left to finish his homework, Greg has 18 - 6 = 12 hours left to finish his homework. The total number of hours Jacob and Greg have left to finish their homework is 12 + 18 = 30 hours. Patrick has 4 hours less than twice Greg has left to finish his homework, meaning Patrick has 4 hours less than 12 * 2 = 24 hours left to finish his homework. Patrick has 24 - 4 = 20 hours left to finish his homework. Altogether, the three have 30 + 20 = 50 hours left to finish their homework.
So the answer is 50.

[Question]: Lena has 16 candy bars. She needs 5 more candy bars to have 3 times as many as Kevin, and Kevin has 4 candy bars less than Nicole. How many more candy bars does Lena have than Nicole?
[Answer]: Kevin has (16 + 5) / 3 = 7 candy bars. Nicole has 7 + 4 = 11 candy bars. Lena has 16 - 11 = 5 more candy bars than Nicole.
So the answer is 5.

[Question]: Zander collected 100 stickers. He gave some of his stickers to his two friends, Andrew and Bill. Andrew received 1/5 of Zander's stickers, while Bill received 3/10 of the remaining stickers. How many stickers did Andrew give to his two friends?
[Answer]:
Andrew received 100 x 1 / 5 = 20 stickers. So, there were 100 - 20 = 80 stickers left. Bill received 80 x 3 / 10 = 24 stickers. Therefore, Andrew gave away 20 + 24 = 44 stickers.
So the answer is 44.