}{t^2})
So Q18 is A.
i) Figure four is four rooves, two sticks down either side, then four across the bottom, using 14 sticks in all.
ii) You need 3n+2 sticks for the nth figure (just by finding a pattern) so sub in n=100 and you get 302 sticks.
iii) solve 3n+2=543 as per the rule. The answer is no since you have to have an integer number for n, as you can't have a non-integer number for the figure number. I'd suggest starting with 3n+2=543, then working down from there, reasoning why n has to be an integer
So the circumference of the earth at the equator is
and there are 360 degrees around there earth. Technically yes you can add 109 and 160 to get the distance, but it asks for the shortest distance, so you take the short side, which is 91 (from 360-(109+160)).
So you get that the shortest distance is
which is equal to whatever, punch it into the calculator
for the next one, realise that 48 degrees west of 160 will cut past 180, so it's actually something degrees east. you'll eventually get to 152 degrees east and 4 degrees south.
Last question
If the median score of 9 is 7, that means there are four scores below it, four above, with the 5th score being seven. Adding two to both sides (two numbers bigger, two numbers smaller) doesnt actually change the median since it's still in the middle positionally in terms of magnitude. Therefore, the answer is B, 7.
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