numbers

I am officially sick of numbers as of this morning.

Today I went for the National Mathematics Olimpiad competition. There were 4 of us, Hui Lynn (highest in add maths..don't play play!), Lien Tee and I (second highest last exams) and Nadzira (no, she's not the third highest). Third highest was Felicia but well as you know, we live in Malaysia, so Malays has to get a place in everything. So Felicia became reserved. Bleh.

So the competition was held at USM. We were supposed to reach at 9.45am because it started at 10am. Then, the scary part was Nadzira and I were in one building (the correct one, mind you) and Lien Tee and Hui Lynn was in another. And through the phone, Lien Tee was yelling at me that she was in the correct place and I was at the wrong place when I was already sitting in front of the papers beside Ms. Ho. Panic, panic. Luckily, they allowed 30 minutes grace period to enter the hall.

I didn't know how or when both of them came in because I was sitting quite in front. Okay, so I opened the papers. Dum, dum, dum. 1st question also quite hard already laaa..2nd question? worse. Some of the questions...

1. (1+2+3+4+.......+n) +k=202. k < n. Find k.

3. A cyclic quadrilateral has 4 angles A, B, C, D. A : B : C = 2007 : 2008 : 2009. Find angle B.

4. (2008)² – (2007)² + (2006)² - .... + 2² - 1² . Find the value.

6. There are 5 positive integers a1, a2, a3, a4, a5.

• a2 - a1 = a3 - a2 = a4 - a3 = a5 - a4 = 30
• a1, a2, a3, a4, a5 are prime numbers.
• a5 <150

Find the smallest possible value of a1.

These are the only 4 questions I'm quite sure I got the right answer. Out of 9 questions. =.= answers (that I got. not sure correct or not):
1. k=12

3. 90

4. 2 017 036

6. 7

If anyone knows how to do..tell me if your answers tally with mine? lol

The hall was so freaking cold and my hands were like ice. We had to sit in there for like 2 1/2 hours. Ms. Ho (our beloved add maths and maths teacher) was an invigilator. She kept standing beside us and it was so annoying. Oh yeah she nearly fell down the stairs. It was mean to laugh but it was really hard to stifle it ok! We were actually planning to go to the toilet and discuss the answers (the seniors taught us! lol) but they only allowed one person to go at a time. Sigh. So after I finished the paper, I drew DOODLES =) When Ms. Ho came and stood beside me, I'm pretty sure she was shaking her head. lol. I didn't know they were gonna collect back the rough paper. Bleh. Just hope they recycle the whole stack without looking at my doodles =/

It finished at 12.30pm. Ate lunch, bathed and rushed to accounts tuition. Half an hour late. And to see more NUMBERS. Argh!! Last week in accounts, I count until I fell sick. Hmm..numbers seem to be bad for me. =)