Find the highest common factor of  \(6\), \(9\)  and  \(18\).

Calculate the compounded value of investment:
$7200 for 9 months at 6% per annum with interest compounded quarterly.

Find the total surface of the prism, leaving in  \({\rm{c}}{{\rm{m}}^2}\).

Consider the vector,  \(\vec a\) ,   whose magnitude is 13 and whose true bearing is  \(310^\circ \).   Find \(x\) and \(y\)  if  \(\vec a = x\vec i + y\vec j\),   correcting to two decimal places.

A certain quadrilateral has each angle \( 10^\circ \) greater than the previous one, except the smallest angle. How large is the smallest angle?

Given  \(P\left( A \right) = \dfrac{1}{2}\) and \(P\left( B \right) = \dfrac{1}{3}\),   find  \(P\left( {A’} \right)\),   correcting to one decimal place.

What is the age of the child who is 35 kg?

Find the interquartile range of the data represented in the box-and-whisker plot.

\( \begin{array}{c|cccccc}
1 & 0 & 1 &&&& \\
2 & 1 & 2 & 6 &&& \\
3 & 2 & 4 & 7 & 7 && \\
4 & 3 &&&&& \\
\end{array} \)

Predict \(y\) when \(x = 8\)

The equation of a straight line perpendicular to \(y = – \dfrac{x}{2} + 4\) and passing through \(\left( {3,1} \right)\) is \(y = Ax + B\).