# Math Is Fun Forum

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

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## #51 2008-07-27 18:05:33

ZHero
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Registered: 2008-06-08
Posts: 1,889

### Re: Brain Teasers

Last edited by ZHero (2008-07-27 18:07:32)

If two or more thoughts intersect, there has to be a point!

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## #52 2008-07-30 16:22:56

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

11)
A man is runs into a forest. After running a mile, he is running out of the forest. How long is the forest?

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## #53 2008-07-30 20:57:11

JohnnyReinB
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Registered: 2007-10-08
Posts: 453

### Re: Brain Teasers

"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted"

Nisi Quam Primum, Nequequam

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## #54 2008-08-01 10:54:57

careless25
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Registered: 2008-07-24
Posts: 560

Yes! Johnny

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## #55 2008-08-01 14:28:45

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

ZHero wrote:

Sry i forgot to reply. Zhero you are right again! Great Job!!

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## #56 2008-08-01 14:33:04

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

12)In a gathering of 50 people what is the probability of finding 2 persons whose birthday falls on the same date?

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## #57 2008-08-01 14:59:30

careless25
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Registered: 2008-07-24
Posts: 560

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## #58 2008-08-01 21:23:40

JohnnyReinB
Member
Registered: 2007-10-08
Posts: 453

### Re: Brain Teasers

"There is not a difference between an in-law and an outlaw, except maybe that an outlaw is wanted"

Nisi Quam Primum, Nequequam

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## #59 2008-08-01 23:30:25

ZHero
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Registered: 2008-06-08
Posts: 1,889

### Re: Brain Teasers

We see the same side of the Moon because Moon's period of Revolution around the Earth is same as its period of Rotation on its Axis.. viz 27 days!!

If two or more thoughts intersect, there has to be a point!

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## #60 2008-08-02 02:54:37

careless25
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Registered: 2008-07-24
Posts: 560

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## #61 2008-08-02 03:00:12

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

JohnnyReinB wrote:

post explanation because it might seem absurd to children in school. Thx.

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## #62 2008-08-02 07:07:13

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

13)
What number comes next in this sequence?
483, 759, 264, 837, ?
14)What, in connection with this question, is the next number below?
4, 13, 19, 21, 29, ?
15)
If 4x4 = 20,
then 5x6 = ?

Last edited by careless25 (2008-08-02 07:10:45)

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## #63 2008-08-03 06:04:47

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

### Re: Brain Teasers

Why did the vector cross the road?
It wanted to be normal.

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## #64 2008-08-03 07:21:59

infinitebrain
Member
Registered: 2008-07-01
Posts: 153

### Re: Brain Teasers

The best thing about life is you don't know what to expect

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## #65 2008-08-03 11:40:58

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

mathsyperson wrote:

Great!:lol:

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## #66 2008-08-03 11:41:35

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

infinitebrain wrote:

no and whats the next number in the sequence?

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## #67 2008-08-04 20:27:21

ZHero
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Registered: 2008-06-08
Posts: 1,889

### Re: Brain Teasers

If two or more thoughts intersect, there has to be a point!

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## #68 2008-08-05 05:26:08

infinitebrain
Member
Registered: 2008-07-01
Posts: 153

### Re: Brain Teasers

I should have known
oh well:)

The best thing about life is you don't know what to expect

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## #69 2008-08-05 06:28:26

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

ZHero wrote:

NO Zhero u r making patterns that dont exist. The numbers are related to the sentence. Read the Question carefully!

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## #70 2008-08-05 16:31:48

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

Question: Why do we always see the same side of the moon?

ZHero wrote:

We see the same side of the Moon because Moon's period of Revolution around the Earth is same as its period of Rotation on its Axis.. viz 27 days!!

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## #71 2008-08-05 20:12:42

ZHero
Real Member
Registered: 2008-06-08
Posts: 1,889

### Re: Brain Teasers

careless25 wrote:

with a nine-, eleven- and fourteen-minute hourglass, can you time the boiling of an egg for 7 mins?

Yes! We don't even need the Fourteen-minute hourglass!
Start the nine- and eleven-minute hourglasses simultaneously. Invert the nine-minute hourglass as soon as its sand has displaced completely and then invert it again as soon as the sand in the eleven-minute hourglass has displaced and start boiling the egg! When the sand in the nine-minute hourglass gets exhausted, you'll have boiled the egg for seven minutes!!

If two or more thoughts intersect, there has to be a point!

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## #72 2008-08-06 08:02:50

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

Good Job Zhero!
You are really good at solving these questions!

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## #73 2008-08-06 10:30:26

ZHero
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Registered: 2008-06-08
Posts: 1,889

### Re: Brain Teasers

Oooh!
thx

If two or more thoughts intersect, there has to be a point!

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## #74 2008-08-07 09:01:34

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

Last edited by careless25 (2008-08-07 09:01:52)

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## #75 2008-08-07 09:04:03

careless25
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Registered: 2008-07-24
Posts: 560

### Re: Brain Teasers

Last edited by careless25 (2008-08-07 09:04:19)

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