Discussion about math, puzzles, games and fun.   Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫  π  -¹ ² ³ °

You are not logged in.

A written test.

#2 Re: Help Me ! » How do I cure carelessness? » 2006-07-29 02:56:14

About checking: After finishing the questions, there is hardly enough time to check, so should I check while doing the questions?

And about tip no. 1, I think I've done that, since the questions are graded from easy to hard.

#3 Help Me ! » How do I cure carelessness? » 2006-07-28 20:10:01

Nigel
Replies: 8

Ok guys, I'm gonna compete in a math competition next Sunday. I've done lots of preparations, and I think I'm ready for it.

Thing is, this week, we had another competition at school. The questions were tough (like they were meant to be). This is where my problem occurs. There are at least 3~4 questions, where I could do it with an eye close, but I did it wrong. For an example, there was a question like this:

Which is the "middlest" day in 2006?

So I just thought. 2006 has 356 days. So I use (N+1)/2 to find the middle day. Answer was 183. Then I wrote down.

Jan 31, Feb 30, March 31, .... June 30.
I thought June 30 was the answer, but it was wrong because FEBRUARY ONLY HAS 28 DAYS!!! I was so mad at myself by giving away free point. Seeing that there are only 30 questions in that competition, one question could mean winning and losing. How could I forgot that February had 28 days. darn! Carelessness.....

There was also another question that asked the sum of 1+3+5+7...+25. And do you know what I calculated? I forgot it was only odd numbers, and used the formula, n/2(a+l) like this:

25/2(1+25)!!!!!

How do I cure it???? I mean my carelessness.:( Thanks.

#4 Re: Dark Discussions at Cafe Infinity » World Cup 2006 » 2006-06-21 22:50:58

Yep. Malaysia is football crazy.

#5 Re: Dark Discussions at Cafe Infinity » World Cup 2006 » 2006-06-19 21:46:46

I'm a huge England fan. England for the win!
They're gonna play Sweden. It will be exciting...

376. d
377. d
378. 6cm

371. 0
373. 2
374. 2

#8 Re: Ganesh's Puzzles » Oral puzzles » 2006-06-04 15:45:25

MathsIsFun wrote:
Nigel wrote:

Nope. You would not guess where I would be from. Serious.

Does it end in an "a"?

Dude you checked the timezone....
Greetings. I'm from Malaysia.

#9 Re: Ganesh's Puzzles » Oral puzzles » 2006-06-03 22:19:24

Nope. You would not guess where I would be from. Serious.

x=0 or x=∞
I think...

#11 Re: Ganesh's Puzzles » Brain Teasers » 2006-06-02 15:54:59

35. a = 1
36. 13-8 = 5seconds?

#12 Re: Ganesh's Puzzles » Oral puzzles » 2006-06-02 15:44:20

361. 0.5
362. 1

I would like to know the answers for 363, 364, 365

#13 Re: Ganesh's Puzzles » Oral puzzles » 2006-06-02 15:41:27

Ganesh I have a question:
327. I used the 1/2absinc formula for this question. Why can't it work?

#14 Re: Ganesh's Puzzles » Oral puzzles » 2006-06-02 02:46:05

327. 16cm
349. 12 questions
350. 121 degrees?
355. Is it 30 cm?
I'm still intermediate so I don't know many of the questions...