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14 Cards in this Set
 Front
 Back
 3rd side (hint)
LCM & HCF using primes? 
1) use factor trees to find primes 2) make a venn diagram for the 2 numbers 3) LCM = × all numbers in venn diagram 4) HCF = x numbers in middle Dont use the indices :) 


Direct proportion? 
A= kb Plug values a & b in Find k, drop line etc Plug new values in and work out 


Inverse proportion? 
A= k÷b 
Same sorta thing as direct 

Pythagoras? 
A* + b* = c* 


C= 
Hypotenuse!! 


Pythag with c? 
To work out missing side: 1)Plot values into a*+b*=c* 2) square them 3)  a from both numbers 4) square root c for missing side 


Quadratic formula? 
Keep + the whole way, solve for 2 answers at the end 


Scatter graphs? 
Positive, negative or weak correlation? Weak? Strong? 


Significant figures? 
To 1.s.f? From 2nd number. 


Similar shapes? 
SCALE FACTOR! = N Area? N* Volume? N^3 


Simultaneous equations? 
make xs or ys the same  add two equations  plug values back into og equation to check 


Standard form? 
Ax10^n Way to shorten big or small numbers 


Surds? 



Rationalising the denominator? 
× bottom and top by * root A × *root = A*root (surd) 
