Question: The kindergartners each need to bring one mini tissue box to class for the school year. There are three kindergartner groups with 9, 10, and 11 students respectively. Each mini tissue box contains 40 tissues. How many tissues do the kindergartner groups bring together?
Answer with step-by-step thinking: There are a total of 9 + 10 + 11 = 30 kindergartners. Altogether, they bring a total of 30 x 40 = 1200 tissues.
So the answer is 1200.

Question: They say the first year of a dog's life equals 15 human years. The second year of a dog's life equals 9 human years and after that, every year of a dog's life equals 5 human years. According to this logic, how many human years has my 10-year-old dog lived?
Answer with step-by-step thinking: If your dog is 10 years old then in his first year of life he lived 1 * 15 = 15 human years. In his second year of life, he lived 1 * 9 = 9 human years. We need to calculate his remaining years or 10 - 2 = 8 years of dog life into human years. If 1 year of dog life after the 2 years equates to 5 human years, then 8 years of dog life equals 8 * 5 = 40 human years. In total, your dog has lived 15 + 9 + 40 = 64 human years.
So the answer is 64.

Question: Issac has to buy pens and pencils for the upcoming school year. Issac buys 108 writing utensils total. He buys 12 more than 5 times the number of pencils than pens. How many pens did Issac buy?
Answer with step-by-step thinking:
Let x be the number of pens bought. He bought 12 + 5x pencils. x + (12 + 5x) = 108. 6x + 12 = 108. 6x = 96. x = 16 pens.
So the answer is 16.