Maths Flashcards
what is 1 dm3 equal to
1000cm3 or 1L
what is 1 m3 equal to
1000L
how to calc density
mass/vol
how to calc pressure
force/area
what are the dividend, divisor and quotient
dividend is the number you are dividing
divisor is the number you are dividing by
quotient is the result
how to tell if a number is divisible by 3
the sum of its digits is divisible by 3
how to tell if a number is divisible by 6
it is divisible by 2 and 3
how to tell if a number is divisible by 7
subtract 2x the last digit from the other digits eg for 546 do 54-(6x2) =42 and 42 is divisible by 7
how to tell if a number is divisible by 9
if the sum of the digits is divisible by 9
how can you recognise a prime number
ends in 1,3,7,9 (except for 2 and 5)
how can you use prime factorisation to see if one number is a factor of another
if a number is a factor of another then all the prime factors of the smaller number will be present in the prime factors of the other number
what does rationalise the denominator mean
write the expression without surds in the denominator
area of a circle
pi x r2
how to find the upper bound of a calculation using multiplication and addition
use the upper bounds of the quantities involved and vice versa with lower bounds
how to find upper bound of a calculation using division
upper bound of dividend and lower bound of divisor
