John weighs 220 pounds when he starts exercising. He manages to lose 10% of his body weight. He then gains back 2 pounds. How much does he weigh at the end?
Let's think: He lost 220 * .1 = 22 pounds. So after gaining some weight back he was 22 - 2 = 20 pounds lighter than before. So his weight is 220 - 20 = 200 pounds.. The answer is: 200.

There are 30 spaces for each vehicle in a parking lot. A caravan takes up a total of 2 spaces of parking space. How many vehicles can still park if there are 3 caravans currently parking?
Let's think: The three caravans used up 3x2 = 6 parking spaces in the parking lot. Therefore, 30 - 6 = 24 vehicles can still park in the parking lot.. The answer is: 24.

Hilary is shucking corn from ears that grew on her farm. She gets four ears of corn per stalk, and she has 108 stalks growing. Half the ears of corn have 500 kernels of corn and the other half have 100 more. How many kernels of corn does Hilary have to shuck?
Let's think: She has 108 * 4 = 432 ears of corn to shuck. She gets 500 kernels of corn from half the ears and 500 + 100 = 600 kernels from the other half. Half the number of ears of corn is 432 / 2 = 216 ears. Thus, Hilary has 216 * 500 + 216 * 600 = 108000 + 129600 = 237600 kernels to shuck.. The answer is: 237600.

Dave weighs 175 pounds and can bench press three times his body weight. Craig can only bench press 20% of the amount Dave can. Mark is new and can bench press 50 pounds less than Craig. How much can Mark bench press?
Let's think:
Dave weighs 175 pounds and can bench press three times his body weight, so he can bench press 175 * 3 = 525 pounds. Craig can only bench press 20% of Dave's 525 pounds, so Craig can bench press .20 * 525 = 105 pounds. Craig bench presses 105 pounds and Mark does 50 pounds less than Craig, so Mark can only press 105 - 50 = 55 pounds.. The answer is: 55.