Algebra
Solve 3x - 1 = 12
13/3
What is 20% of 300?
60
What is the mode of the given data:
3,6,2,5,7,2,5,7,2,6,2,3,2,2,3,2,2,4
2
What is the sum of all angles in a triangle?
1800
What is the formula for area of a triangle?
1/2(base*height)
Factorise: 12xy-16x2
4x(3y-4x)
What is the HCF of 120,150,175
30
What is the median of :
4,2,6,8,3,7,2,8,9,1,5,2,7
5
The angles in a pentagon are 1700, 800, 1300, 550, and x0.
Find x.
1050
The area of a parallelogram is 192 cm2. If one side of the parallelogram is 16cm, find the corresponding height of the parallelogram.
12cm.
Solve: (y + 7)/y = 3
y=7/2 or 3.5
Last month, 15% of the patients at a hospital were late for their appointments.
920 patients had appointments last month.
How many patients were on time for their appointments?
782
Find the mean of :
12,15,16,17,12,16,16,13,16,15,15,16,17,17,13,13,16,16,16,15,14,13,15,16,13,15,14
14.88888 = 14.9
Find the size of each interior and exterior angle of a regular polygon which has 15 sides.
Each exterior angle = 240
Each interior angle = 1560
Find the volume of a closed cylinder of its height is 5cm and base diameter is 10cm.
125pi
or 392.69999 = 392.70
Anna thinks of a number x.
She adds 5 to it and multiplies the sum by 2.
When the result is divided by 5, the final answer is -4.
Find the number Anna first thought of.
-15
Here are the first five terms of a sequence:
9 13 17 21 25
Is 68 a term of the sequence?
No, 68 is even and numbers in this sequence are all odd.
The data below shows the number of children in different families in a city.
Number of children Number of families
0 16
1 14
2 12
3 9
4 5
5 1
a) find the mode.
b) find the mean number of children.
a) mode= 0
b) mean = 1.578 = 1.58
Find the value of n.
8
A trapezium of area 204 cm2 is formed from a piece of 78 cm long wire. The height of the trapezium is 8cm.
The ratio of length of the longer parallel side to the length of the shorter parallel side is 12:5.
Find the length of the shorter parallel side.
15 cm.
Raymond and Willian shared $350.
The sum consisted of a total of 19 ten-dollar notes and 50-dollar notes. Let the number of 10-dollar notes be x.
Form an equation in terms of x and solve it.
x= 15
The weekly allowances that Vicky and Jane each receive are in the ratio 2:1.
If Vicky gives $8 to Jane, the ratio becomes 2:3.
Let Jane's weekly allowance be $x.
Form an equation in x and solve it.
x=10
The mean weight of five complete computer stations is 167.2 pounds. The weights of four of the computer stations are 158.4 pounds, 162.8 pounds, 165 pounds, and 178.2 pounds respectively. What is the weight of the fifth computer station?
171.6