Monica read 16 books last year. This year, she read twice the number of books she read last year. Next year, she wants to read 5 more than twice the number of books she read this year. How many books will Monica read next year?

The number of books that Monica read this year is 2 * 16 =

<<2*16=32>>32 books. Twice the number of books that Monica read this year is 2 * 32 = <<2*32=64>>64 books. The number of books that Monica will read next year is 64 + 5 = <<64+5=69>>69 books. #### 69 A crayon factory makes 4 colors of crayons. They put 2 of each color crayon in each box. The factory produces enough crayons to fill 5 boxes per hour. How many crayons does the factory produce in 4 hours? Each box contains 4*2=<<4*2=8>>8 crayons. In an hour, they make 8*5=<<8*5=40>>40 crayons. In 4 hours they make 4*40=<<4*40=160>>160 crayons. #### 160 Every time Carl earned $0.50 he would go to the corner market and buy a candy bar. Carl's neighbor said he would pay him $0.75 every week for taking out his trash. At the end of four weeks, how many candy bars will Carl be able to buy? He is paid $0.75 every week for 4 weeks, so Carl made .75 * 4 = $<<.75*4=3.00>>3.00 in 4 weeks Each candy bar cost $0.50 and he made $3.00 so 3.00/.50 = <<3.00/.50=6>>6 candy bars #### 6 In the fall, 20,000 high school students apply to Harvard University for college. In the spring, 5% of those 20,000 students are accepted to the university. Of the students who are accepted, 90% choose to attend the university, and the other 10% choose to go to other schools. How many students choose to attend Harvard University? The number of students accepted to the university is 20,000 * 0.05 = <<20000*0.05=1000>>1,000 students The number of students who choose to attend the university is 1,000 * 0.9 = <<1000*0.9=900>>900 students #### 900 Lulu has $65 in her piggy bank. She spent $5 on ice cream. She then spent half of the remainder of the money on a t-shirt. Afterwards, she went to the bank and deposited a fifth of her remaining money. How much cash was Lulu left with? Lulu had 65-5 = <<65-5=60>>60 dollars left after eating ice cream. Lulu had 60/2 = <<60/2=30>>30 dollars left. Lulu deposited 30/5 = <<30/5=6>>6 dollars Lulu was left with 30-6 = <<30-6=24>>24 in cash. #### 24 A frog pond has five frogs living in it. Some frogs laid eggs, and now there are three times as many tadpoles growing into more frogs as there are frogs. Two-thirds of the tadpoles will survive to maturity as frogs. The pond can only sustain eight frogs. How many frogs will have to find a new pond when the tadpoles grow up? There are three times the number of tadpoles as frogs, so there are 3 * 5 = <<3*5=15>>15 tadpoles. Two-thirds of the tadpoles will survive to become frogs, so 2 * 15 / 3 = <<2*15/3=10>>10 tadpoles will grow into frogs. When the tadpoles grow up, there will be 5 + 10 = <<5+10=15>>15 frogs in the pond. The pond can only sustain 8 frogs, so 15 - 8 = <<15-8=7>>7 frogs will need to find a new pond. #### 7 Tate finishes high school in 1 year less than normal. It takes him 3 times that long to get his bachelor's degree and Ph.D. How many years did he spend in high school and college? He finished high school in 4-1=<<4-1=3>>3 years It takes him 3*3=<<3*3=9>>9 years to finish tertiary education So he spends 3+9=<<3+9=12>>12 years on this education #### 12 5 geckos on the kitchen window eat 6 insects each. 3 lizards eat twice as much as the geckos. How many total insects were eaten? The number of insects the geckos eat is 5 x 6 = <<5*6=30>>30. The number of insects the lizards eat is 3 x 12 = <<3*12=36>>36. The total number of insects eaten is 30 + 36 = <<30+36=66>>66 insects. #### 66 When Mark bought his first tv it was was 24 inches wide and 16 inches tall. It cost $672. His new tv is 48 inches wide and 32 inches tall and costs $1152. How much more expensive as measure by cost per square inch, was his first TV compared to his newest TV? His first TV was 384 square inches because 24 x 16 = <<24*16=384>>384 His first TV cost $1.75 per square inch because 672 / 384 = <<672/384=1.75>>1.75 His new TV is 1,536 square inches. It costs $.5 per square inch because 1152/ 1,536 = .5 His old TV cost $1 more per square inch because 1.75 - .75 = <<1.75-.75=1>>1 #### 1 Three baskets A, B and C contain different numbers of differently colored marbles. Basket A contains 4 red marbles and 2 yellow marbles. Basket B contains 6 green marbles and 1 yellow marble. Basket C contains 3 white marbles and 9 yellow marbles. What is the difference between the number of each color of marble in the basket that has the greatest difference? In basket A the number difference between differently colored marbles is 4-2 = <<4-2=2>>2 In basket B the difference is 6-1 = <<6-1=5>>5 In basket C the difference is 9-3 = <<9-3=6>>6 Comparing 2, 5 and 6 shows that 6 is the greatest difference #### 6