Jump to content


Welcome to BrainDen.com - Brain Teasers Forum

Welcome to BrainDen.com - Brain Teasers Forum. Like most online communities you must register to post in our community, but don't worry this is a simple free process. To be a part of BrainDen Forums you may create a new account or sign in if you already have an account.
As a member you could start new topics, reply to others, subscribe to topics/forums to get automatic updates, get your own profile and make new friends.

Of course, you can also enjoy our collection of amazing optical illusions and cool math games.

If you like our site, you may support us by simply clicking Google "+1" or Facebook "Like" buttons at the top.
If you have a website, we would appreciate a little link to BrainDen.

Thanks and enjoy the Den :-)
Guest Message by DevFuse
 

Photo
- - - - -

old funny one


Best Answer Riddari, 30 August 2007 - 07:08 PM

As Unreality calculated, the child is -0.75 years old. I did this the easy way, though. If in 6 years the mother will be 21 years older than and 5 times as old as the child, then:
5*(X+6) = (X+6)+21
4*(X+6) = 21
X+6 = 5.25
X = -0.75

So, at present the child is three quarters of a year shy of being born.
Three quarters of a year is nine months.
Nine months is the average gestation period of a human.
Assuming a perfect pregnancy, Dad should be with Mom in a very intimate fashion right now.
Of course, children are not born exactly nine months after conception. So, right now might be several weeks before or after the exact moment of conception.
Still, I think that was the intent of the riddle. Go to the full post


  • Please log in to reply
31 replies to this topic

#1 smile4me

smile4me

    Junior Member

  • Members
  • PipPip
  • 20 posts

Posted 30 August 2007 - 06:08 PM

right now mum is 21 years older then her child. in 6 years her child will be 5 times younger than she.

Q: where is daddy?
  • 0

#2 impact504

impact504

    Newbie

  • Members
  • Pip
  • 6 posts

Posted 30 August 2007 - 06:30 PM

he's in chino looking at a dime for possession.
  • 0

#3 unreality

unreality

    Senior Member

  • Members
  • PipPipPipPip
  • 6370 posts

Posted 30 August 2007 - 06:44 PM

right now mum is 21 years older then her child. in 6 years her child will be 5 times younger than she.



since there is a 21 year difference...

for mom to be twice as old:
21*2 = 42
child is 21 and mom is 42

for mom to be three times as old:
21*1.5=31.5
child is 10.5, mom is 31.5

four time as old:
21*1.333333* = 28
child is 7, mom is 28

five times as old:
21*1.25 = 26.25
child is 5.25, mother is 26.25

But we have to subtract 6 years now

CHILD IS -.75 years old (so approx 2.25 months in the womb so far) and MOM is 20.25 years old
  • 0

#4 Riddari

Riddari

    Junior Member

  • Members
  • PipPip
  • 48 posts

Posted 30 August 2007 - 07:08 PM   Best Answer

As Unreality calculated, the child is -0.75 years old. I did this the easy way, though. If in 6 years the mother will be 21 years older than and 5 times as old as the child, then:
5*(X+6) = (X+6)+21
4*(X+6) = 21
X+6 = 5.25
X = -0.75

So, at present the child is three quarters of a year shy of being born.
Three quarters of a year is nine months.
Nine months is the average gestation period of a human.
Assuming a perfect pregnancy, Dad should be with Mom in a very intimate fashion right now.
Of course, children are not born exactly nine months after conception. So, right now might be several weeks before or after the exact moment of conception.
Still, I think that was the intent of the riddle.
  • 0

#5 Martini

Martini

    Senior Member

  • Members
  • PipPipPipPip
  • 770 posts

Posted 30 August 2007 - 07:12 PM

Okay, since this seems to be an actual teaser, I'll have it moved back to "New Riddles". Sorry about that smile4me and welcome to the boards!

CHILD IS -.75 years old (so approx 2.25 months in the womb so far) and MOM is 20.25 years old


Actually, the child is brand new in the womb, since .75 of a year is about 9 months. So the father is...well, ya know- pretty close by.

Edit: Riddari beat me to it.
  • 0

#6 unreality

unreality

    Senior Member

  • Members
  • PipPipPipPip
  • 6370 posts

Posted 30 August 2007 - 07:14 PM

oh yeah sorry i was thinking .75 of the gestation period, woops!

lol smile, you dirty ******
  • 0

#7 smile4me

smile4me

    Junior Member

  • Members
  • PipPip
  • 20 posts

Posted 31 August 2007 - 03:19 PM

oh yeah sorry i was thinking .75 of the gestation period, woops!

lol smile, you dirty ******



life is too short.. let's have some fun too ..
  • 0

#8 bonanova

bonanova

    bonanova

  • Moderator
  • PipPipPipPip
  • 5732 posts
  • Gender:Male
  • Location:New York

Posted 31 August 2007 - 03:29 PM

life is too short.. let's have some fun too ..

I'm all for that. Do you happen to have mum's phone number?
  • 0
The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
- Bertrand Russell

#9 smile4me

smile4me

    Junior Member

  • Members
  • PipPip
  • 20 posts

Posted 31 August 2007 - 05:07 PM

I'm all for that. Do you happen to have mum's phone number?



daddy won't be excited ...
  • 0

#10 unreality

unreality

    Senior Member

  • Members
  • PipPipPipPip
  • 6370 posts

Posted 31 August 2007 - 09:42 PM

we can overpower him...
  • 0




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users