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

You are not logged in.

- Topics: Active | Unanswered

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

(1) Is 1298045602 a perfect square?

(2) Is 6719247 a prime number?

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

(3) How many times would you have to write the number 6 when you write from 1 to 100?

(4) A bus contains 23 men and 14 women. In the first stop after the start, 11 men board and 2 women do. In the next stop, 6 men board and 3 women do. In the next, 2 men alight and 2 women do, but also 2 men board the bus and 2 women do. The question is, how many places did the bust stop from the start to the destination? (You are granted 20 seconds for this, as a special case!)

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

Great to have you back, Ganesh.

1. No

2. No

3. 10? Unless it's a trick question

4. 3, not counting the start.

EDIT: Wait - I think number 4 was a trick question. You didn't specify that there was a destination - So I don't think there is way of knowing, without saying that the third stop was the destination.

*Last edited by Devanté (2006-09-20 04:32:05)*

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

Hi Devante, and thanks, a big thanks for the welcome back message.

Your answers 1, 2, and 4 are absolutely right. 3.....think again....how many times would you have to write the number 6 from 60 to 66 alone ?

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

Oh...I see.

6, 16, 26, 36, 46, 56, 60, 66, 76, 86, 96.

I think that's all of them...

I think 11.

Offline

**pi man****Member**- Registered: 2006-07-06
- Posts: 251

got to include all of the sixty's:

6, 16, 26, 36, 46, 56, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 76, 86, 96. That's 20 (there's two in 66).

Offline

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

is 3. 14 or 16?

Presenting the Prinny dance.

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

Offline

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

o its 11

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

Thanks pi man. I stand corrected.

See pi man's post, Espeon.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

(5) In the realm of whole numbers, apart from zero and one, which the smallest number which is both a perfect square and a perfect cube?

(6) What is the angle between the hands of a clock when the time is 8.00?

(7) What is the side total of a 3X3 magic square with numbers from 1 to 9?

(8) How many zeros does a trillion (US) contain?

(9) What are the common factors of 111, 222, 333, 444, 555, 666, 777, 888, and 999? (Four of them)

(10) How many furlongs is a mile?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**justlookingforthemoment****Moderator**- Registered: 2005-05-26
- Posts: 2,161

5) 64

6) 240°

7) 15

8) 12 (alternatively, 'a trillion (US)' contains no zeros)

9) 1, 3, 37, 111

10) 8

Offline

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

5. 64

6. 240 degrees

7. 15

8. 12 - And in the UK it is 18.

9. 1, 3, 37, 111

10. 8

I'll check my answers when I have time, I'm pretty sure one of my answers doesn't look right.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

Great, Devante` and justlookingforthemoment, your replies are all correct

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

11. What is so special about the number 2.7182818284.... to mathematicians?

12. How many nano seconds is a second?

13. Which number has got the highest probability of being displayed when a pair of dice is cast?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

14. How many seconds is an hour?

15. How many digits is 22/7 a correct aprroximation of pi?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

**justlookingforthemoment****Moderator**- Registered: 2005-05-26
- Posts: 2,161

Offline

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

14. 60x60=3600 seconds

12.100?

*Last edited by espeon (2006-09-23 00:07:31)*

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

I'll count the nanosecond noughts afterwards.

Offline

**ganesh****Administrator**- Registered: 2005-06-28
- Posts: 25,355

Excellent, all of you, Devante', jl, espeon.

16. How many prime numbers are there from 1 to 100?

17. How many numbers, including 7, are divisible by 7 from 1 to 100?

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

Offline

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

16. 25, obviously not counting 1.

17. 14? This is probably like the one with the sixes.

Offline

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

I read justlookingforthemoment's answers after Ganesh told us that we were correct (and Espeon).

It's e not e!.

Offline

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

yay?

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

Offline

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

Remember that a nanosecond is extremely small. It is a big number, but it an extremely small unit of time.

Offline

**justlookingforthemoment****Moderator**- Registered: 2005-05-26
- Posts: 2,161

Devanté wrote:

It's e not e!.

Yeah, I knew someone would write that, because I wrote it in a maths project once.

Something like, 'And that shows that the height of the cube is x!'

Offline

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

I also did something like that. Never put emotion into your math - The teacher doesn't look upon it very kindly.

Offline