### If (math version)

If you can solve a literal equation

And rationalise denominator surds,

Do grouping factors (with a transformation)

And state the factor theorem in words;

If you can plot the graph of any function

And do a long division (with gaps),

Or square binomials without compunction

Or work cube roos with logs without mishaps.

If you possess a sound and clear-cut notion

Of interest sums with *P* and *i* unknown;

If you can find the speed of trains in motion,

Given some lengths and "passing-times" alone;

If you can play with *R* (both big and little)

And feel at home with *l* (or *h*) and *pi*,

And learn by cancellation how to whittle

Your fractions down till they delight the eye.

If you can recognise the segment angles

Both at the centre and circumference;

If you can spot equivalent triangles

And friend Pythagoras (his power's immmense);

If you can see that equiangularity

And congruence are two things and not one,

You may pick up a mark or two in charity

And, what is more, you may squeeze through, my son.