Books never written riddle

How many of the first 500 positive integers are divisible by 3, 4 and 5?

I am a 5 digit number. My ones digit is three times greater than my tens digit. My ten thousand digit is 3 more than my tens digit. My hundreds digit is twice my ten thousand digit. My thousands digit is one less than my hundreds digit.

You are camping in the Boundary Waters Canoe Area (BWAC). You want to rent a canoe for you and your friend. Canoes are $25 for the first day and $10 for each additional day.

A menu in a restaurant allows you to pick some items from Column A and some from Column B. Column A has 24 items. Column B has 16 items.

In a certain Algebra 2 class of 28 students, 16 of them play basketball and 15 of them play baseball. There are 8 students who play neither sport. What is the probability that a student chosen randomly from the class plays basketball or baseball?

A three-dice is a six sided dice with only the numbers 1, 2 and 3. The usual numbers 4, 5 and 6 are replaced by 1, 2 and 3 respectively. 4 three-dice (with sides labeled 1, 2, and 3) are rolled and the numbers face up on the 4 dice are recorded.

Judy is making scarves to give to her family as gifts. She needs to make 5 scarves and each scarf is 3.75 feet long. How many yards of fabric does Judy need to buy?

Find the margin of error for a 95% confidence interval for estimating the population mean when the sample standard deviation equals 100 , with a sample size of (i) 484 and (ii) 1764. What is the effect of the sample size?

5 A dangerous criminal has escaped from prison. The police believe he could not have traveled more than 10 mi in any direction from the prison. How many square miles must be searched?

Give the locations of the 2 mountain ranges