Bob, Tom, Sally, and Jerry had dinner at their favorite pizzeria. They decide to share 2 pizzas. Bob ate half of a pizza on his own. Tom ate one-third of a pizza. Sally wasn't very hungry and only ate one-sixth of a pizza, and Jerry ate a quarter of a pizza. If each pizza is cut into 12 slices, how many slices were left over?
Let's think: Each pizza is 12 slices. Bob at 12 slices / 2 = 6 slices. Tom ate one third, or 12 slices / 3 = 4 slices. Sally ate one sixth, or 12 slices / 6 = 2 slices. Jerry ate one quarter, or 12 slices / 4 = 3 slices. In total, they ate 6 slices + 4 slices + 2 slices + 3 slices = 15 slices. So they were left with 12 slices per pizza * 2 pizzas - 15 slices = 24 slices - 15 slices = 9 slices.. The answer is: 9.

Jack and Jill are friends who borrow from each other often. Last week Jack borrowed $1200 from Jill, which he promised to pay back with an interest of 10%. How much will Jack pay back?
Let's think: The interest on the loan is 0.1 * 1200 = $120. The total amount Jack needs to pay back is 1200 + 120 = 1320.. The answer is: 1320.

Kiki likes to spend her money on hats and scarves. When she buys twice as many hats as scarves, she spends 60% of her money on hats and the rest on scarves. If she currently has $90, how many scarves will she buy if they are sold at $2 each?
Let's think: Kiki spends 60 / 100 * $90 = $54 of her money on hats. The amount she spends on buying scarves is $90 - $54 = $36. If each scarf is sold at $2, Kiki will buy $36 / $2 = 18 scarves.. The answer is: 18.

Mark builds an apartment that is 16 by 10 feet. There are 6 rooms in total. All the rooms are the same size except the living room which is as big as 3 other rooms. How big is the living room?
Let's think:
Total square footage is 16 * 10 = 160 square feet. . There are 3 + 3 = 6 rooms. 6 - 1 = 5 of them are the same size. If x is the size of the normal room then the square footage of all rooms is 5x + 3x = 8x. So each room is 160 / 8 = 20 square feet. So the living room is 20 * 3 = 60 square feet.. The answer is: 60.