Question: Ken buys gummy vitamins. They are usually $15.00 per bottle at his grocery store, but they are currently 20% off. On top of that, he has 3 $2.00 coupons. How much will 3 bottles cost?
Answer: The vitamins are $15.00 a bottle and are currently 20% off so that’s 15 * .20 = $3.00 off. The vitamins are $15.00 and they are $3.00 off so they are now 15.00 - 3 = $12.00. He has 3 $2.00 coupons so that’s 3 * 2 = $6.00 in coupons. He buys 3 bottles at $12.00 each so that’s 3 * 12 = $36.00. He has $6.00 in coupons so his vitamins will now costs 36 - 6 = $30.00. The answer is 30.

Question: Three baskets A, B and C contain different numbers of differently colored marbles. Basket A contains 4 red marbles and 2 yellow marbles. Basket B contains 6 green marbles and 1 yellow marble. Basket C contains 3 white marbles and 9 yellow marbles. What is the difference between the number of each color of marble in the basket that has the greatest difference?
Answer: In basket A the number difference between differently colored marbles is 4 - 2 = 2. In basket B the difference is 6 - 1 = 5. In basket C the difference is 9 - 3 = 6. Comparing 2, 5 and 6 shows that 6 is the greatest difference. The answer is 6.

Question: Donald went to a computer store. He saw a 15% reduction in the price of the laptop he wants to buy. If the laptop originally costs $800, how much will he pay for the laptop?
Answer: There was $800 x 15 / 100 = $120. Thus, Donald will pay $800 - $120 = $680. The answer is 680.

Question: Larry and Barry want to pick apples out of the tree, but neither is tall enough to reach the apples. Barry can reach apples that are 5 feet high. Larry is 5 feet tall, but his shoulder height is 20% less than his full height. If Barry stands on Larry's shoulders, how high can they reach?
Answer:
Larry's shoulder height is 20% less than 5 feet, or 0.2 * 5 = 1 foot less than 5 feet. One foot less than 5 feet is 5 - 1 = 4 feet. If Barry stands on Larry's shoulders, they can reach 4 + 5 = 9 feet. The answer is 9.