[Question]: Caleb and Cynthia are filling up their inflatable pool with water using buckets. They fill their buckets at the spigot and carry them to the pool. Caleb can add 7 gallons from his bucket and Cynthia can add 8 gallons from her bucket each trip. It will take 105 gallons to fill the pool. How many trips will it take for Caleb and Cynthia to fill the pool with their buckets?
[Answer]: Each trip, they add Caleb’s 7 gallons + Cynthia’s 8 gallons = 15 gallons. Since they are adding 15 gallons every trip, to fill the 105 - gallon pool, it would take 105 / 15 = 7 trips.
So the answer is 7.

[Question]: Carl types at a speed of 50 words per minute. If he types continuously for 4 hours per day, how many words can he type in 7 days?
[Answer]: The number of words that Carl can type per hour is 50 * 60 = 3000 words. The number of words that Carl can type in 4 hours is 3000 * 4 = 12000 words. The number of words that Carl can type in 7 days is 12000 * 7 = 84000 words.
So the answer is 84000.

[Question]: Ofelia joined a saving challenge wherein she has to save twice the amount she saved from the previous month. In January, she saved $10. How much is she going to save in May?
[Answer]:
Ofelia saves $10 x 2 = $20 in February. She will save $20x 2 = $40 in March. She will save $40 x 2 = $80 in April. Thus, she will save $80 x 2 = $160 in May.
So the answer is 160.