Category 1: Math Riddles
I am an odd number. Take away a letter and I become even. What number am I?
7 (Seven minus the letter 'S' is "even").
Why was the math book sad?
Because it had too many problems.
How many sides does a standard stop sign have?
8 (An octagon).
What do you call an angle that is adorable?
An acute angle (A cute angle).
5 + 5 x 0 = ?
5 (Order of operations: multiply first!).
Which weighs more: a pound of feathers or a pound of bricks?
Neither! They both weigh exactly one pound.
Why should you never start a conversation with Pi?
Because it will just go on and on forever.
What is the only number that is spelled with the same number of letters as its weight/value?
Four (F-O-U-R has 4 letters).
If a triangle has sides of 3 cm, 4 cm, and 5 cm, what specific type of triangle is it?
A Right Triangle.
What is 10% of $200?
$20
What has a face and two hands, but no arms or legs?
A clock.
What did the triangle say to the circle?
"You're pointless."
What specific shape are the cells in a beehive's honeycomb?
Hexagons.
How many total degrees are in a perfect circle?
360°.
Solve for x: 2x + 7= 15
x = 4
A grandfather, two fathers, and two sons went to the movie theater together and bought exactly three tickets. How did they all get a seat?
There were only three people. It was a grandfather, his son, and his grandson.
Why did the student get upset when the teacher called them "average"?
Because it was a mean thing to say.
In Roman numerals, what letter represents the number 1,000?
M.
If you bake a 12-inch pizza, does "12 inches" refer to the radius, the diameter, or the circumference?
The diameter.
What is the next number in this sequence: 1, 4, 9, 16, 25, ...
36
If a multiplied by b equals 24, and a minus b equals 5, what are the two numbers? (Assuming both are positive integers).
8 and 3 (8 x 3 = 24 and 8 - 3 = 5).
Why did the two 4s skip lunch?
Because they already 8 (ate)! (4 + 4 = 8).
What is the name for a polygon with 12 sides?
A dodecagon.
What do you call two lines that control their temper and never, ever cross?
Parallel lines.
What is the value of 33 - 23 = ?
19