## Minorities stick together

Consider the following scenario.

How many ways can you arrange the shoes, so that the black shoes must always be together?

Before we tackle this problem, let’s simplify it a little. Let’s imagine they are all in a straight line. B = black shoes, T = tri-coloured shoes. Let’s try to see all the possibilities.

B B T T T T = 5 x 4 x 3 x 2 x 1 x 2 = 240

Therefore, the total number of possibilities are 240.

Now, back to the scenario.

If we arrange the shoes in a circle, will the answer be the same?

## SPM and PMR, panic attack class

Tick, tock, tick, tock…

Are you having a panic attack?

Don’t worry. What you need during these last days is a rock-solid tutor to steady your nerves. An expert in last minute study himself, Joshua Hooi knows exactly what you must do.

“Why you scared, last time I also like that,” says Joshua Hooi, recalling his own schooling days. “In the end, still get A1!”

Waste no more time. Come alone, or get a group to come with you. Click on Services to see how he can help you. Click on Terms to find out what his conditions are. Click on Contact to get his 24-hour hotline.

He will turn your fear into joy.