RIDDLES
FRACTIONS
VARIABLES
ALGEBRA
100

I am a number. Add 10 to me and you get 18. What am I?

8

100

Half of me is 12. What is the number?

24

100

Add 15 to me and I am 33. Write and solve for x. 

x = 18

100

If you square me and subtract 25, the result is 0. What is x?

x = 5 or -5

200

Subtract 6 from me and the answer is 9. What am I?

15

200

Three-fourths of a number decreased by 9 is equal to one-half of the number. What is the number?

36

200

A number decreased by 8 is 14. Express as an equation and solve.

x = 22

200

A number squared minus twice the number equals 24. Find x.

x = 6 or -4

300

Multiply me by 4 and I become 32. What am I?

8
300

A number divided by 3, increased by 15, equals twice the original number minus 20. Find the number.

21

300

Two times a number increased by 5 is 21. Solve for x.

x = 8


300

Three times a number increased by 14 is equal to 5 times the number minus 8. Find x.

x = 11

400

If you divide me by 5, the result is 7. What am I?

35

400

Half of a number added to two-thirds of the same number equals 14. Find the number.

12

400

Three times a number decreased by 2 is equal to 19. Find x.

x = 7

400

Six times the sum of a number and 3 is 4 times the same number plus 34. Solve for x.

x = 8

500

Three consecutive integers add up to 48. What is the smallest number?

15

500

Adding two-fifths of a number to one-third of the same number equals 22. Find the number.

30

500

Five times the difference of a number and 4 is equal to 35. Solve for x.

x = 11

500

Two times the sum of a number and 7 is equal to 3 times the number decreased by 5. Find x.

x = 19