Search over 10,000 free study notes

In a survey people had to choose either A, B, C or D. The percentage of people that chose B, C and D are shown here: B- 25% C- 35% D- 30% You are also told that 150 people chose B. How many chose A? So first...

Algebra is always a bit confusing when you first learn is as it's the first time letters come into maths, here is the mainthing you should remember: you have to do the same thing to both sides of the equatio...

Jodie works for a bookshop, she is paid £6.50 an hour plus 5% of the cost of each book she sells. On Saturday she worked for 3 hours and sold £220 worth of books. How much did she earn on saturday? Here we n...

Fraction questions can confuse a lot of students when phrased in this way, a good place to start therefore is to think of the number 9 as the fraction 9/1. Now we know the rule that when you have a fraction ...

KCL is Kirchoff Current Law, this law says the total current walk pass a node is always zero, it is just like a water supply system, if the whole apartment is considered as a node, the water that flow outsid...