Guess My Number
I’m thinking of a number. I add 9 to it and get 21. What’s my number?
12
Write an equation. A number increased by 8 is 20
x + 8 = 20
x+7=15
x=8
What is 48 + 37?
85
What type of triangle has angles measuring 60∘, 60∘, and 60∘
equilateral
I’m thinking of a number. I double it and then add 7. I get 25. What’s my number?
9
Write an equation. Three times a number is 27
3x = 27
-3x=24
x=-8
What is 75 × 4?
300
A rectangle has a length of 8 units and a width of 5 units. What is its area?
40 square units
I’m thinking of a number. I triple it, then subtract 8. I get 28. What’s my number?
12
Write an equation. Five less than twice a number is 17.
2x − 5 = 17
2x+5=17
x=6
What is 15% of 60?
9
A triangle has a base of 12 units and a height of 7 units. What is its area?
42 square units
I’m thinking of a number. I double it, add 5, and then double that result. I get 34. What’s my number?
6
Write an equation. Triple the sum of a number and 6, is 30.
3(x + 6) = 30
5x−8=2x+13
x=7
What is 25 × 16
400
A right triangle has legs measuring 6 units and 8 units. What is the length of its hypotenuse?
10 units
I’m thinking of a number. I triple it, subtract 4, and then halve the result. I get 10. What’s my number?
8
Write an equation. Seven less than three times a number is equal to twice the number plus 9.
3x − 7 = 2x + 9
4(2x−3)=3(x+6)+5
x=7
What is 1,440 ÷ 16?
90
A rectangle has an area of 48 square units. Its width is 2 units less than its length. What is the perimeter of the rectangle?
28 units