Martha is knitting winter clothes for her 3 grandchildren, who are all the same size (identical triplets.) Each set of clothes consists of a woolen hat, a scarf, a sweater, a pair of mittens, and a pair of wooly socks. She can knit a hat in 2 hours. A scarf takes her 3 hours. Each mitten takes her about an hour to knit. A sock takes an hour and a half. Each sweater takes her 6 hours. How long will it take her to knit all the outfits? Give the rationale and then the answer.
Let's think step by step. A pair of mittens takes 1 hour per mitten * 2 mittens = 2 hours. A pair of socks takes 1.5 hours per sock * 2 socks = 3 hours. So a complete outfit for each child takes 2 hours per hat + 3 hours per scarf + 2 hours per pair of mittens + 3 hours per pair of socks + 6 hours per sweater = 16 hours per outfit. So to knit winter outfits for all three of her grandchildren, Martha will take 3 outfits * 16 hours per outfit = 48 hours.. The answer is: 48.

A town council began the decade by planting cherry trees around the neighborhood to make the neighborhood look more welcoming. By the end of the decade, they have planted twice as many cherry trees as they originally planned and have now realized that falling cherry blossom leaves are causing a problem. Each tree drops 100 leaves each during the fall. If the town council originally intended to plant 7 cherry trees, how many leaves now fall from the trees? Give the rationale and then the answer.
Let's think step by step. The council planted twice their goal so there is a total of 7 planned cherry trees * 2 = 14 cherry trees. So there must be 14 cherry trees * 100 leaves falling from each tree = 1400 leaves.. The answer is: 1400.

In a big box, there are marbles in 4 colors. Inside, there are 20 red marbles. There are three times more green marbles than red. Yellow marbles make up 20% of the green marbles. How many marbles are of a different color if the total of all marbles in the box is three times more than the number of green marbles? Give the rationale and then the answer.
Let's think step by step. There are 3 * 20 = 60 green marbles. There are 60 * 20 / 100 = 12 yellow marbles. In total there are 3 * 60 = 180 marbles. That leaves 180 - 20 - 60 - 12 = 88 marbles of another color in the box.. The answer is: 88.