For Halloween, Taquon, Mack and Jafari put their candy together and they had 418 pieces of candy. If Taquon and Mack each had 171 pieces of candy, how many pieces of candy did Jafari start with?
Let's think: Taquon + Mack = 2 * 171 = 342 pieces. 418 - 342 = 76 pieces. Jafari started with 76 pieces of candy.. The answer is: 76.

Ephraim has two machines that make necklaces for his store. On Sunday the first machine made 45 necklaces. The second machine made 2.4 times as many necklaces as the first machine. How many necklaces were made in total on Sunday?
Let's think: The second machine made 2.4 times as many necklaces as the first machine, so the second machine made 2.4 * 45 = 108 necklaces on Sunday. In total, 45 + 108 = 153 necklaces were made on Sunday.. The answer is: 153.

Tyler has 21 CDs. He gives away a third of his CDs to his friend. Then he goes to the music store and buys 8 brand new CDs. How many CDs does Tyler have now?
Let's think: Tyler gives away 21 / 3 = 7 CDs. After giving away a third of his CDs, Tyler has 21 - 7 = 14 CDs. After buying new CDs, Tyler has 14 + 8 = 22 CDs.. The answer is: 22.

Jerica is twice Louis' age. Matilda is 7 years older than Jerica. If Louis is 14, how many years old is Matilda?
Let's think:
Jerica = 2 * 14 = 28. Matilda = 28 + 7 = 35. Matilda is 35 years old.. The answer is: 35.