Charley pulled out 90 / 6 = 15 black beads. Charley pulled out 51 / 3 = 17 white beads. Charley pulled out 15 + 17 = 32 beads in total.
The answer: 32
Reverse engineering the question: Charley has a bag that contains 51 white beads and 90 black beads. He reaches in the bag and pulls out 1/6 of the black beads and a third of the white beads. How many beads in total did Charley pull out?

The chocolate doughnuts cost 10 * $2 = $20. The glazed doughnuts cost 15 * $1 = $15. The total cost for the doughnuts is $20 + $15 = $35.
The answer: 35
Reverse engineering the question: Bryce is bringing in doughnuts for his class. There are 25 students in his class, 10 kids want chocolate doughnuts and 15 want glazed doughnuts. The chocolate doughnuts cost $2 each and the glazed doughnuts cost $1 each. How much is the total cost for doughnuts?

The bugs ate enough plants for there to be 30 - 20 = 10 left. They were still full and only ate half, leaving 10 / 2 = 5 plants left. Later on, the bugs only ate 1 more which left 5 - 1 = 4 plants in the garden.
The answer: 4
Reverse engineering the question: Bugs are thriving in a garden of 30 plants. The bugs are very hungry today and completely ate 20 plants. The next day, they were still full and only ate half of the remaining plants. After that, they ate only 1 of the plants that were left. How many plants remain?

He needs 500 / 50 = 10 bags of flour. That cost 20 * 10 = $200. He needs 10 * .2 = $2 worth of salt. So everything cost 1000 + 200 + 2 = $1202. He makes 20 * 500 = $10,000 selling tickets. So he makes a profit of 10000 - 1202 = $8798.
The answer: 8798
Reverse engineering the question:
Tom wants to make the world's largest dough ball. He needs 500 pounds of flour and he can buy 50-pound bags of flour for $20. He also needs 10 pounds of salt and salt cost $.2 a pound. He also spends $1000 promoting everything. He then sells tickets for $20 each and sells 500 tickets. How much money did he make?