Mathematics competition

Mental Math

100

225 - 213 + 205 - 320 + 1000 =

897

200

2.5 x 11² 

302.5

300

10000 x 550

5500000

400

120 - 100 x 5 + 180 + 5  

205

500

Find f(2) when f(x)= 2x² +12x + 4000

4032

Subject Knowledge

100

Find the median of this data set: 8,4,7,9,68, 4, 7, 9, 68,4,7,9,6.

7

200

Find the distance between the points (1, 2) and (7, 8)

8.49 or radical 72 

300

Find the domain of the function f(x) = √(x – 4)

domain: x ≥ 4

400

Find the y-intercept of the line 4y +8x – 20 = 0

5

500

Solve the system:

   • x + y = 6 

   • 2x – y = –3

x = 1 

y = 5

Math is Fun!

100

I am a number between 20 and 30. I am divisible by 3 but not by 2. What number am I?

27

200

Find the number: It is even, less than 40, and two thirds of it is 24

16

300

@ x @ x @  = -27

*  + @ x @  =  7

# + * + #   = -14

* x # x - @  = ?

15

400

What is 10% of 20% of 100?

2

500

Guess a three-digit number divisible by 3 and by 5.

150