Mathematics class challenge.

Number Theory

100

What is the value of 7²+4³

113

200

2/7+1/3 = 

13/21

300

What is 60 out of 75 as a percentage ?

80%

400

There are 96 rose plants in a plot. Half of them are yellow, 1/4 are red, 1/8 are white and the rest are pink. How many are pink?

12

500

   hrs       mins

   6            37

+ 3           45

10hrs    22mins

Geometry

100

An angle measuring less than 90 degrees. 

acute angle

200

The sum of angles in a quadrilateral is ?

180^0

300

Two angles of a triangle are 76degrees and 80 degrees. What is the size of the third angle?

24degrees

400

A trapezium has four sides. State one other property of a  trapezium.

Has one pair of parallel sides.

500

What is the complementary angle of 46 degrees. 

44 degrees

Algebra

100

Solve the equation: x - 7 = -2

x = 5

200

Simplify the expression:

5m + 3n - 9m - 6m

- 4m - 3m

300

If a = 3, b =-4 and c =5, find the value of :

2a  - b + c

15

400

Solve the equation:

3x + 1 = 2x - 4

x = - 5

500

If

7/3 =x/24

, what is x?

56

Statistics and Probability

100

What is the mode of the set of data?

 5, 7, 9, 5, 3, 2 

5

200

A bag contains 5 red, 4 blue and 3 green marbles. What is the probability of selecting a green or blue marble from the bag?

7/12

300

The average of 3 numbers is 23. If two of the numbers are 19 and 24, what is the third number? 

26

400

What is the median of the set of data? 

12, 5, 7, 21, 9, 8

8.5

500

The probability of selecting a number from a bag containing numbers and letters is 7/11. What is the probability of selecting a number ?

4/11

Mensuration

100

Formula to find the area of a rectangle.

A = Length x width

200

Convert 4.5 kilometres to metres

4500 metres 

300

The diameter of a circle is 25 cm. What is the radius of the circle?

12.5cm

400

Calculate the area of triangle of height 8cm and base 12cm. 

48cm²

500

Three angles of a triangle are (x+20)^o, 2x and x^o. What is the value of x? 

40^o