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. The answer is 3.

Question: Two sisters go to the movies. Movie tickets are $8 per person. If the sisters brought $25 with them, how much change will they receive after buying the tickets?
Answer: Movie tickets cost for two people is $8 x 2 = $16. The sisters will receive change of $25 - $16 = $9. The answer is 9.

Question: Clara brings a package of 100 stickers to school. She gives 10 stickers to a boy she likes. She gives half of the stickers which she has left to her best friends. How many stickers does Clara have left?
Answer: She gives the boy she likes 10 stickers. After giving the boy his stickers, she has 100 – 10 = 90 stickers left. She gives her best friends 90 / 2 = 45 stickers. This leaves Clara with 90 – 45 stickers = 45 stickers. The answer is 45.

Question: Out of the 150 students, 60% are girls and the rest are boys. Only 1/3 of the boys joined varsity clubs. How many of the boys did not join varsity clubs?
Answer:
Out of the 150 students, 100% - 60% = 40% are boys. So, there are 150 x 40 / 100 = 60 boys. Out of the 60 boys, 60 x 1 / 3 = 20 joined varsity clubs. Therefore, 60 - 20 = 40 boys did not join varsity clubs. The answer is 40.