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Oh, got it! That makes sense. Thank you. Noted down for next time.

For part C) The book has given the answer of: = 7! x 4! + 8! x 3! - 5! x 4! x 3! = 345 600 I think this is incorrect, according to my working, the answer is Working: Probability of potted roses adjacent = 7! x 4! (Book gets it right) + Probability of azaleas adjacent...

Hey all, doing WACE but I figured that this was the most active of forums, so I may as well talk here. Doing Specialist, Methods, Accounting, Physics, Chemistry and English. Good luck everyone.

Was looking through the IMO and IOI results and some Japanese person, Yuta Takaya, got first in both. What a gun!

A bit of help on this question please, this is a bit of practice for the AIMO. This is all the working I've managed to do

Bump.

1 followed by 100 zeros is 101 digits

How would you solve this algebraically: A nude number is a natural number of whose digits are a factor of the number. Find all 3 digit nude numbers where no digits are repeated. Can't seem to make in roads :/ I can solve it case by case, but I want to know a quicker way of how to do it.

Anyone from here doing the AIMO?

Didn't get up to it :/, only had time to concentrate on the first 27 questions, I hate the short time limit. What did you get for 26/27?

Anyone else complete the intermediate?

Good luck, I hope you get at least a prize.

Have questions about the area of a hexagon or a n-gon?

Surely you'd get a prize. I'm hoping for a prize, fed up of missing on them by 2/3 points.

You seem a great chance for a medal. I'm pretty confident I got 87 points and I'm hoping that one of the 3 I guessed were correct.

Good luck for tomorrow everyone :)

Here's a solution to one of them:

Here are 3 more to keep you going through the day:

Could you please post your working si2136. I wasn't sure on how to do that question, thanks.