Joanna has $8. Compared to her money, her brother has thrice as much while her sister has only half as much. How much money do the three of them have altogether?
Let's think: Joanna has $8. Joanna's brother has thrice as much as Joanna, so he has $8 * 3 = $24. Her sister has half as much as Joanna, then she has $8 / 2 = $4. Together they have $8 + $24 + $4 = $36 altogether.. The answer is: 36.

A snake's head is one-tenth its length. If a snake is 10 feet long, calculate the length of the rest of its body minus the head.
Let's think: A snake's head is one - tenth its length, which is 1 / 10 * 10 = 1 foot. Since the snake's head is 1 foot, the rest of its body is 10 - 1 = 9 feet long.. The answer is: 9.

A cake has 8 slices and each slice contains 347 calories. A pan of brownies has 6 brownies and each slice contains 375 calories. How many more calories does the cake have?
Let's think: The cake has 8 slices * 347 calories = 2776 calories. The brownies have 6 slices * 375 = 2250 calories. The cake has 2776 calories - 2250 = 526 more calories.. The answer is: 526.

John buys a gaming PC for $1200. He decides to replace the video card in it. He sells the old card for $300 and buys a new one for $500. How much money did he spend on his computer, counting the savings from selling the old card?
Let's think:
He spent an extra 500 - 300 = $200 on the video card. That means the total cost was 1200 + 200 = $1400.. The answer is: 1400.