A portable battery charger can fully charge a smartphone in 26 minutes or a tablet in 53 minutes. Ana charged her tablet fully and her phone halfway. How many minutes did it take? Give the rationale and then the answer.
Let's think step by step. Ana charged her phone halfway, so she took 26 / 2 = 13 minutes to charge her phone. Thus, it took Ana 13 + 53 = 66 minutes to charge her phone and tablet.. The answer is: 66.

Wendy works at a chocolate factory packing chocolates. She can package 2 dozen chocolates in 5 minutes. How many individual chocolates can she package in 4 hours? Give the rationale and then the answer.
Let's think step by step. There are 60 minutes in an hour and she packs chocolate in 5 - minute increments. So that's 60 / 5 = 12 5 minute increments in 1 hour. 12 chocolates make 1 dozen and she packages 2 dozen in 5 minutes so that's 12 * 2 = 24 chocolates in 5 minutes. 12 5 minute increments are in an hour and she packages 24 chocolates in 5 minutes so she can package 12 * 24 = 288 individual chocolates in 1 hour. If she packages 288 individual chocolates in 1 hour then in 4 hours she can package 288 * 4 = 1,152 individual chocolates.. The answer is: 1152.

Tony puts $1,000 in a savings account for 1 year. It earns 20% interest. He then takes out half the money to buy a new TV. The next year, the remaining money earns 15% interest. How much is now in the account? Give the rationale and then the answer.
Let's think step by step. After one year he earns $200 in interest because 1,000 x .2 = 200. After one year it has $1,200 in the account because 1,000 + 200 = 1,200. He takes out $600 because 1,200 / 2 = 600. After this it has $600 in it because 1,200 - 600 = 600. She earns $90 in interest because 600 x .15 = 90. The account now has $690 because 600 + 90 = 690.. The answer is: 690.