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

You are not logged in.

- Topics: Active | Unanswered

**espeon****Real Member**- Registered: 2006-02-05
- Posts: 2,586

40. there are as many stars as there are in the universe(he never said u need an exact number now did he ^.^)

Presenting the Prinny dance.

Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline

**Patrick****Real Member**- Registered: 2006-02-24
- Posts: 1,005

Wow, can you really see through planets ?

Support MathsIsFun.com by clicking on the banners.

What music do I listen to? Clicky click

Offline

**espeon****Real Member**- Registered: 2006-02-05
- Posts: 2,586

what does that have to do with anything?

Presenting the Prinny dance.

Take this dood! Huh doood!!! HUH DOOOOD!?!? DOOD HUH!!!!!! DOOOOOOOOOOOOOOOOOOOOOOOOOD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

espeon wrote:

40. there are as many stars as there are in the universe(he never said u need an exact number now did he ^.^)

That answer makes absolutely no sense.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

Hairy thing....estimated average 80,000. Could be anywhere between 60,000 and 80,000. Sometimes even 0

Stars: Between 3,000 and 6,000. depending on visibilty etc.

mathsyperson is correct, the formula is v+s=e+2,

Well done, mathsyperson!

Character is who you are when no one is looking.

Offline

**Toast****Real Member**- Registered: 2006-10-08
- Posts: 1,321

lol we are supposed to solve these in 10 seconds? x_x

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

Yes. We are masterminds, so no one can stop us expanding in wisdom and brain fluid.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

43. What is the significance of the number 0.4343 approximately in Mathematics?

44. And what is the significance of the number 2.303 approximately?

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

43. Multiply a natural logarithm by 0.4343 to convert it to a common logarithm

44. ln(10) is about 2.303

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

Excellent, Devate`.

The two numbers are important to mathematicians.

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

Go me.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

45. How many Watts is a Horsepower?

46. What is the significance of the number 6.023 x 10^23?

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

45. 745.699872 watts

46. The most common use of exponents in science (hence the first half of the name) and the most important reason to get used to using exponents. In scientific notation numbers are represented as the product of a real number with only a single digit to the left of the decimal and the number 10 raised to an appropriate value. Thus: 602300000000000000000000 = 6.023 x 100000000000000000000000 There are 23 zeros to the left of the decimal in the right-most value. Thus: 100000000000000000000000 = 10^23 and 602300000000000000000000 = 6.023 x 10^23

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

Regarding #46, I forgot to put approximately at the end of the question.

The number ought to be known both to mathematicans, and more importantly to scientists.

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

Was #46 part-correct, though?

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

To be fair, your answer has got nothing to do with the question.

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

Aww.

Well, I do know that in the nineteenth century physicists measured the mass of one atom of hydrogen to be about 1/(6.023x10^23) grams.

Is that relevant?

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

Oh yes, very well. 6.023x10^23 is Avogadro's Number.

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

Also found this: http://gemini.tntech.edu/~tfurtsch/scihist/avogadro.htm

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

47. What is the remainder when 1000 is divided by 7?

48. Roughly how many seconds is a day?

49. What's the difference between a billion in US and that in UK?

50. If the third angle of an isosceles triangle is 82° , what is the measure of the equal angles?

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

47. 6

48. 1440x60 = 86400

49. In the US, a billon has 9 zeros. In the UK, however a billion consists of 12 zeros.

50. 98/2 = 49

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

All your answers are correct.**Excellent, Devante'**

Character is who you are when no one is looking.

Offline

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 17,533

51. Approximately how many degrees is a radian?

52. Is 768625 divisible by 11?

53. What is the slope of the line joining the points (11,7) and (21, 2)?

Character is who you are when no one is looking.

Offline

**Devantè****Real Member**- Registered: 2006-07-14
- Posts: 6,400

51. 1 Radian = 57.2957795 degrees

52. Yes

53. [Deleted Incorrect Answer]

*Last edited by Devanté (2006-10-14 23:50:49)*

Offline

**mathsyperson****Moderator**- Registered: 2005-06-22
- Posts: 4,900

52. Yes, because 7-6+8-6+2-5 = 0, which is divisible by 11 and so 768625 also is.

53. (7-2)/(11-21) = -0.5

Why did the vector cross the road?

It wanted to be normal.

Offline