FORMULA SHEET
Math Topics
Age problems
Work hours problems
Clock angles and Sector area
Algebraic expressions
Speed distance problems
Fractions & Percentages
Range, mean, Mod, Median
Simple Geometry problems
Basic Arithmetic
Probability
Ratios
Profit, Discount problems
Equation solving for Variables
Basic Calculations
Square, Marble Size
Bridge Length
Fraction Based Gain, Loss
Finding Share
Page 1
, 1.Mean
The mean average is not always a whole number.
The mean is the total of the numbers dividedby how many numbers there are.
To work out the mean:
1. Add up all the numbers.
7 + 9 + 11 + 6 + 13 + 6 + 6 + 3 + 11 = 72
2. Divide the answer by how many numbers there are.
There are 9 numbers.
72 ÷ 9 = 8
So the mean value is 8.
2: Mode
The mode is the value that appears the most.
7 9 11 6 13 6 6 3 11
To work out the mode:
1. Put the numbers in order:
3 6 6 6 7 9 11 11 13
2. Look for the number that appears the most.
6 appears more than any other number.
So the mode value is 6.
Page 2
Math Topics
Age problems
Work hours problems
Clock angles and Sector area
Algebraic expressions
Speed distance problems
Fractions & Percentages
Range, mean, Mod, Median
Simple Geometry problems
Basic Arithmetic
Probability
Ratios
Profit, Discount problems
Equation solving for Variables
Basic Calculations
Square, Marble Size
Bridge Length
Fraction Based Gain, Loss
Finding Share
Page 1
, 1.Mean
The mean average is not always a whole number.
The mean is the total of the numbers dividedby how many numbers there are.
To work out the mean:
1. Add up all the numbers.
7 + 9 + 11 + 6 + 13 + 6 + 6 + 3 + 11 = 72
2. Divide the answer by how many numbers there are.
There are 9 numbers.
72 ÷ 9 = 8
So the mean value is 8.
2: Mode
The mode is the value that appears the most.
7 9 11 6 13 6 6 3 11
To work out the mode:
1. Put the numbers in order:
3 6 6 6 7 9 11 11 13
2. Look for the number that appears the most.
6 appears more than any other number.
So the mode value is 6.
Page 2
