Riddles
It's All About Numbers!
Four Operations
Worded problems
Geometry
100

I am a shape, so perfect and round,
No sides or corners can be found.
What am I?

A circle

100

I am an even number. I am greater than 10 but less than 30. My digits add up to 6. What number am I?

24 (2 + 4 = 6)

100

If you have 20 apples, give away 6, and share the rest with one of your friends, how many apples do you have?

7 apples

100

When I was 10, my sister was half my age. I am now 40. How old is my sister?

35 years old

100

What is the area of a square with a side length of 10 cm?

100 cm2

200

Jessica’s father had 5 children:
Mark, Helen, Justin, Arnold, and…?
What is the fifth child’s name?

Jessica

200

I am a number between 40 and 50. I am an odd number, and the sum of my digits is 9. What number am I?

45 (4 + 5 = 9)

200

What is the remainder when you divide 50 by 7?

1

200

Tom has 12 apples. He gives 3 apples to each of his 3 friends. How many apples does he have left?

3 apples
200

What is the perimeter of an equilateral triangle with sides of 7 m?

21 m

300

I represent a part of a whole,
Split into pieces, that’s my role.
What am I?

A fraction

300

I am a 2-digit number. I am between 60 and 80. My tens digit is 2 more than my ones digit. You cannot divide me by 2. What number am I?

75

300

What is 10 - 3 x 2

4
300

Sara read 15 pages of her book every day for a week. If the book has 200 pages, how many more pages does she need to read to finish it?

95 pages

300

A square has an area of 49 cm2. How long is each side?

7 cm

400

John has five sisters, each with one brother,
Sisters and a brother, let’s make the call,
What’s the total number of children in all?

6 children

400

I am a number that is a factor of 30. I am not a prime number, not a multiple of 3, and not less than 3. What number am I?

10

400

You had 30 apples. You shared them with your friends, and now each of you has 5 apples. How many friends do you have?

5 friends

400

A farmer has 24 chickens and 18 cows. How many legs are there in total on the field?

120 legs
400

A rectangle has a perimeter of 50 cm. If one of its longer sides is 20 cm, what is the length of its shorter side?

5 cm

500

Two mothers and two daughters went to the show,
Bought only three tickets, how could that be so?
Three was enough, no need for more,
How could it be, tell me…go!

There were three people: a grandmother, her daughter, and her granddaughter.

500

I am a two-digit number. My tens digit is one more than my ones digit. The sum of my digits is 9. What number am I?

54 (5 + 4 = 9)

500

What is twice 24, minus 8, and then split into half?

20

500

A school has 240 students. If 3/4 of the students are participating in a sports event, how many students are not participating?

60

500

A triangle has an area of 20 cm2. If its base is 10 cm, what is its height?

4 cm