MATH x / + -

I thought of a number

100

I thought of a number. I multiplied my number by 7, added 38 to the result, and I got 101. What is my number?

my number is 9

200

I thought of a number. I subtracted 27 from my number, then divided the result by 3, and I got 4. What is my number?

my number is 39

300

I thought of a number. I divided my number by 8, then added 11 to the result, and got 15. What is my number?

my number is 32

400

I thought of a number. I divided my number by 42, then added 72 to the result, and got 73. What is my number?

my number is 42

500

I thought of a number. I added my number by 728, then multiplied 324 to the result, and got 235,975.68. What is my number?

my number is 0.32

Absolute Value

100

 if -x=5 then what is | -x |

| -x |=5

200

|x-2|=5

x=?

x= 7,-3

300

| x | = -6

x=?

no solutions 

400

double points!

|-5|+|-12|-|-3|=?

14

500

Solve 

|-21|+|11|-|-8|

24

sum of interior angles

100

triangle

180 degrees 

200

quadrilateral

360 degrees

300

pentagon

540 degrees

400

hexagon

720 degrees

500

n-gon

(n-2)180 degrees 

solve using an easy way

100

982/10-882/10=?

10

200

546x31+454x31=?

31000

300

double points!

394/5-294/5=?

20

400

953x4-653x4=?

1200

500

724/3+150/3+128/3

334

percentages

100

0.22 convert into a percentage

22%

200

0.5924 convert into a percentage

59.24%

300

70/1000 convert into a percentage

7%

400

66.6666666666 convert into a percentage

6666.6666666%

500

3/9 convert into a percentage

33.33333333333%