[Question]: Billy is counting the rings in two trees. Weather fluctuations in this area mean that each tree's rings are in groups of two fat rings and four thin rings. If Billy counts 70 ring groups in the first tree and 40 ring groups in the second tree, how much older is the first tree? (Trees grow 1 ring per year.)
[Answer]: First find the total number of rings in a ring group: 2 rings + 4 rings = 6 rings. Then subtract the number of ring groups in the second tree from the number in the first tree to find the difference: 70 groups - 40 groups = 30 groups. Then multiply that number by the number of rings in a group to find the difference in the trees' ages: 30 groups * 6 rings / group = 180 rings, or 180 years.
So the answer is 180.

[Question]: Mikaela was repainting her bathroom. She bought 16 containers of paint to cover the four equally-sized walls. At the last minute, she decided to put tile on one wall in the bathroom and paint flowers on the ceiling with one container of paint instead. How many containers of paint will she have left over?
[Answer]: Mikaela would use 16 / 4 = 4 containers of paint per wall. To paint 3 walls, she will use 3 * 4 = 12 containers. After using 1 container for the ceiling, she will have 16 - 12 - 1 = 3 containers of paint left over.
So the answer is 3.

[Question]: Lexi wants to run a total of three and one-fourth miles. One lap on a particular outdoor track measures a quarter of a mile around. How many complete laps must she run?
[Answer]:
There are 3 / 1 / 4 = 12 one - fourth miles in 3 miles. So, Lexi will have to run 12 (from 3 miles) + 1 (from 1 / 4 mile) = 13 complete laps.
So the answer is 13.