[Question]: Amanda's garden contains 20 flowers and Peter's garden contains three times as many flowers as Amanda's. If Peter gave 15 flowers to his brother, how many flowers are left in his garden?
[Answer]: The number of flowers in Peter's garden is 20 * 3 = 60 flowers. The number of flowers left after he gave his brother 15 flowers is 60 15 = 45 flowers.
So the answer is 45.

[Question]: In 6 months Bella and Bob will be celebrating their 4th anniversary. How many months ago did they celebrate their 2nd anniversary?
[Answer]: First, we find their current point in time be realizing that 4 years is 4 sets of 12 months, meaning at that anniversary they will have been together 4 * 12 = 48 months. Then, we subtract their 6 month difference, finding they are at 48 - 6 = 42 months into their relationship. Since 2 years would be 2 * 12 = 24 months into the relationship. We take the larger number, 42, and subtract the smaller number, 24 to find the difference in months, meaning it is 42 - 24 = 18 months.
So the answer is 18.

[Question]: The length of a rectangle is four times its width. If the area is 100 m2. what is the length of the rectangle?
[Answer]:
Let L be the length and W be the width of the rectangle. Hence L = 4 * W. We now use the area to write 80 = L * W. Substitute L by 4 W in the equation above 80 = 4 * W W = 4 W^2. Solve for W and find L. 4 W^2 = 100. W^2 = 25, W = 5 and. L = 4 * 5 = 20 m.
So the answer is 20.