Connie is trying to remember when her grandmother was born. She knows her grandmother's older brother was born in 1932, her older sister was born in 1936, and the gap between her grandmother and her sister is twice the gap between the older brother and the older sister. What year was Connie's grandma born?
Let's think: First find the age gap between the older brother and sister by subtracting the earlier birth year from the later: 1936 - 1932 = 4 years. Then double the age gap to find how many years passed between the sister's birth and the grandmother's: 4 years * 2 = 8 years. Then add 8 years to the older sister's birth year to find the grandmother's birth year: 1936 + 8 = 1944.. The answer is: 1944.

In the school's library, there are 2300 different books. 80% of all the books are in English, but only 60% of these books were published in the country. How many English-language books have been published outside the country?
Let's think: There are 80 / 100 * 2300 = 1840 books in English at the library. Out of these books, only 60 / 100 * 1840 = 1104 were published inside the country. So there are 1840 - 1104 = 736 books in English published outside of the country.. The answer is: 736.

Jack makes his own cold brew coffee. He makes it in batches of 1.5 gallons. He drinks 96 ounces of coffee every 2 days. It takes 20 hours to make coffee. How long does he spend making coffee over 24 days?
Let's think: He makes it in batches of 1.5 * 128 = 192 ounces. He drinks 96 / 2 = 48 ounces of coffee a day. So he drinks the coffee in 192 / 48 = 4 days. So in 24 days he makes 24 / 4 = 6 batches. That means he spends 6 * 20 = 120 hours making coffee.. The answer is: 120.

Each bank teller has 10 rolls of coins. Each roll has 25 coins. How many coins do four bank tellers have in all?
Let's think:
Each bank teller has 10 x 25 = 250 coins. Thus, four bank tellers have 250 x 4 = 1000 coins.. The answer is: 1000.