Hazel and Razel are twins who share everything they receive. If Hazel received 6 shirts, while Razel received twice the number of shirts as Hazel. How many shirts do they have in total?
Let's think: Razel received 6 x 2 = 12 shirts. Therefore, they have 12 + 6 = 18 shirts altogether.. The answer is: 18.

Zion made a triangular-shaped house of cards with the base having a measurement of 40 centimeters and a height of 20 centimeters. If two of his friends also built similar shaped houses, what's the total area of the triangular houses that Zion and his friends made (the area of a triangle is 1/2 * width * height)?
Let's think: Since the area of a triangle is given by 1 / 2 base * height, the area of the triangular - shaped house of cards that Zion made is 1 / 2 * 40 * 20 = 400 square centimeters. If two of his friend also built similar shaped houses, the total area of their triangular - shaped house of cards is 400 + 400 = 800 square centimeters. Together with Zion, they all built triangular - shaped houses of cards with a combined area of 800 + 400 = 1200 square centimeters.. The answer is: 1200.

Janet has 9 cards more than Brenda. Mara has twice as many cards as Janet. How many cards do they have in all if Mara has 40 cards less than 150?
Let's think: Mara has 150 - 40 = 110 cards. Janet has 110 / 2 = 55 cards since Mara has twice as many as Janet. Brenda has 55 - 9 = 46 cards since Janet has 9 cards more than Brenda. Therefore, they all have 110 + 55 + 46 = 211 cards.. The answer is: 211.

Barbara has 9 stuffed animals. Trish has two times as many stuffed animals as Barbara. They planned to sell their stuffed animals and donate all the money to their class funds. Barbara will sell her stuffed animals for $2 each while Trish will sell them for $1.50 each. How much money will they donate to their class funds?
Let's think:
Barbara will be able to sell all her stuffed animals for 9 x $2 = $18. Trish has 9 x 2 = 18 stuffed animals. Trish will be able to sell all her stuffed animals for 18 x $1.50 = $27. Therefore, they will donate a total of $18 + $27 = $45 to their class funds.. The answer is: 45.