Answer this question:Jack sews 3 shirts for each of his 3 kids. He sews 7 buttons in each shirt. How many buttons must Jack use for all the shirts?
The total number of shirts for all his kids is 3 * 3 = 9 shirts. The total number of needed buttons is 9 * 7 = 63 buttons.
The answer is 63.

Answer this question:Moore's family compared mobile phone plans to get the best deal. At T-Mobile, the family plan costs $50 per month for the first two lines and $16 for each additional line. At M-Mobile, the family plan costs $45 for the first two lines and $14 for each additional line. Moore's family needs to purchase 5 cell phone lines. How much cheaper is the M-Mobile than T-Mobile?
The three additional lines at T - Mobile cost $16 x 3 = $48. The total cost of the family plan at T - Mobile is $50 + $48 = $98. The three additional lines at M - Mobile cost $14 x 3 = $42. The total cost of the family plan at M - Mobile is$45 + $ 42 = $87. Therefore, M - Mobile is $98 - 87 = $11 cheaper than T - Mobile.
The answer is 11.

Answer this question:James gets 3 parking tickets. The first 2 cost $150 each and the third cost 1/3 as much as one of these. His roommate agrees to pay half the cost. How much money does he have left if he had $500 in the bank?
The third ticket cost $150 / 3 = $50. So the tickets cost $150 * 2 + $50 = $350. That means he paid $350 / 2 = $175. So he had $500 - $175 = $325 left over.
The answer is 325.

Answer this question:A new book sold 15 copies at the bookstore on Wednesday. On Thursday the book sold three times that many copies. On Friday the book sold one-fifth the number of copies it did on Thursday. How many copies of the book did the bookstore sell by Friday?
On Thursday 15 * 3 = 45 books were sold. On Friday 45 / 5 = 9 books were sold. Adding up all three days 15 + 45 + 9 = 69 books were sold by Friday.
The answer is 69.