Marjorie works as a baker. Every day, she makes twice as many cakes as she did the day before. On the sixth day, she makes 320 cakes. How many cakes did Marjorie make on the first day?
Let's think: As the number of cakes doubles each day, Marjorie must have made 320 cakes / 2 = 160 cakes on the fifth day. So on the fourth day, she must have made 160 cakes / 2 = 80 cakes. This means that on the third day, she made 80 cakes / 2 = 40 cakes. On the second day, she made 40 cakes / 2 = 20 cakes. So on the first day, she made 20 cakes / 2 = 10 cakes.. The answer is: 10.

Johnny is a guitar player and he has three colors of guitar picks: red, blue, and yellow. Half of his picks are red, one-third of the picks are blue, and the rest are yellow. If he has 12 blue picks, what is the total number of yellow picks in his collection?
Let's think: If one third (1 / 3) of his picks are blue, then 3 times the total number of blue picks equals his total pick count, or 3 * 12 = 36 picks. If half of the picks are red, then he has 36 / 2 = 18 red picks. If the rest of the picks are yellow, then he has 36 - 18 - 12 = 6 yellow picks.. The answer is: 6.

Arman is six times older than his sister. His sister is 2 years old four years ago. In how many years will Arman's age be 40?
Let's think: Arman's sister is 4 + 2 = 6 years old now. So, Arman is 6 x 6 = 36 years old. Hence, Arman will be 40 in 40 - 36 = 4 years.. The answer is: 4.

Tom originally was only able to lift 80 kg farmer handles per hand. After some training, he was able to double this number. He then decided to specialize and was able to get an extra 10%. How much weight can he hold in total?
Let's think:
After doubling he was able to hold 80 * 2 = 160 kg per hand. Specialization gave him another 160 * .1 = 16 kg. So he lifted 160 + 16 = 176 kg per hand. That means he lifted a total of 352 kg.. The answer is: 352.