Mathematics Trivia

16

If a bicyclist rides at 10 miles per hour for 10 minutes, and then speeds up to 20 miles per hour for the next 20 minutes, what is her average speed for this ride?

3

Two people dig cylindrical holes in the earth: one hole is two feet in diameter by two feet deep, and the other hole is one foot in diameter by one foot deep. The big hole is how many times the size of the small hole? is it twice as large, three times as

10

If a clock started ticking on January 1, by which date would it reach one million seconds? By January 12 or February 12?

6

In a scale model drawing of a car, the linear scale is 1:20. If it would take 1/4 liter of paint to cover the outside of the model of the car, how much paint would it take to cover the real car?

14

One bicyclist can ride around a circular track in four minutes, a second in five minutes, and a third in six minutes. If all three riders begin at the same time, how long will it be until they coincide the next time?

7

A person is rowing a boat 2 miles from shore, at 5 miles per hour. Immediately on arrival at the shore he takes a taxi 5 miles down the shore, averaging 20 miles per hour. How long will this trip take?

16

What is the sum of the square root of 4/9 and the square root of 9/16? Express your answer as a mixed number.

13

If the sales tax on a product rises by 1/4 %, and this tax increase causes you to pay an extra $10 on a purchase, what was the original price of the item?

2

What day of the week was January 1, 1995?

13

Let's say a pizzeria charges for their pies proportional to the size of the pie. If a 10" pizza costs $10, then what should a 12" pizza cost?

3

If, after receiving a 20% discount when buying a television set, and after paying 7% tax, you paid $642, what was the original marked price of the TV set?

9

If you looked at a clock in the mirror and the time on the clock face appeared to read 8:20, what time would it be in reality?

15

What will be the units digit of the number represented by 3 to the 24th power?

15

Three kids put up their own money to make a lemonade stand: the first kid puts up $6, second $3, and the last $1. If they take in $100 and share the profits equally, how much of the $100 will go to the first kid?

9

As you sit in your stopped car at a railroad crossing, a train travelling at 60 miles per hour takes twenty seconds to pass you. How many feet long is the train?