Ratio extra 1.
The number of red, blue and yellow counters in a bag are in the ratio 5:3:2.
a) If there are 10 more red than blue, how many yellow are there?
b) If there are 100 counters altogether, how many of each colour are there?

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.