Freaky test

Mathematics

100

These are the first five terms of a sequence. 11 18 25 32 39 Find an expression for the nth term of the sequence.  

7n+4

200

Factorise 12m ² - 75t²

3(2m−5t)(2m+5t)

300

Solve simualtneously

5x-3 ln y = 2
x+ ln y = 1

x=5/8
y= e^3/8