[Question]: Max can trade 3 coconuts for a crab and 6 crabs for a goat. If he has 342 coconuts and he wants to convert all of them into goats, how many goats will he have?
[Answer]: First find the number of crabs Max can get by dividing the number of coconuts by the exchange rate with crabs: 342 coconuts / 3 coconuts / crab = 114 crabs. Then divide the number of crabs by the exchange rate with goats: 114 crabs / 6 crabs / goat = 19 goats.
So the answer is 19.

[Question]: Libby has 160 quarters in her piggy bank. She has to pay $35 to replace her sister's dress that she borrowed and ruined. After replacing the dress, how many quarters will Libby have left?
[Answer]: There are 4 quarters in every dollar, so $35 x 4 = 140 quarters. Libby has 160 quarters 140 quarters to repay her sister = 20 quarters left.
So the answer is 20.

[Question]: Jack went to a supermarket with $100 and bought 4 bottles of water. Then his mother called him and asked him to buy twice as many bottles as he already bought. Each bottle cost $2. Finally, he also bought half a pound of cheese and 1 pound of cheese costs $10. How much money does Jack have remaining?
[Answer]:
Jack's mother asked him to buy 2 * 4 = 8 bottles of water. Thus Jack bought 4 + 8 = 12 bottles of water in total. Altogether, the bottles of water cost 12 * $2 = $24. The cheese cost 1 / 2 * $10 = $5. So Jack spent $24 + $5 = $29 on water and cheese. Since he started with $100, he now has $100 - $29 = $71 left.
So the answer is 71.