Math Is Fun Forum

lorynjane

Member

Registered: 2011-02-27

Posts: 13

Can anyone answer this? How old? :dunno

Four astronaut brothers, Neil, John, Buzz and Eugene, all do tours of duty on a space station. Neil returns to earth every 9 weeks; John returns every 10 weeks; Buzz returns every 11 weeks and Eugene returns every 12 weeks. Each visit home is on a Friday for one day, and is included in the number of weeks above. They are all home for there mother's 50th Birthday Party. How old will she be when she next has all four sons home together?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: Can anyone answer this? How old? :dunno

Not another one!

Would you like Maths Is Fun to do the whole sheet?  lol

Now you almost know the answer to this one.

The 11 week astronaut and the 10 week astronaut won't be home together until 110 weeks have past.  Sound familiar?

It's just the multiples question with an extra twist.  The answer will be in weeks and you'll have to convert it into years to get her new age.

ps.  Look again at the multiples thread because you haven't completely answered the question.

Bob

Last edited by Bob (2011-02-27 04:35:39)

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

lorynjane

Member

Registered: 2011-02-27

Posts: 13

Re: Can anyone answer this? How old? :dunno

so i have to make 110 weeks into years and add it to her age and then i have my answer??

lorynjane

Member

Registered: 2011-02-27

Posts: 13

Re: Can anyone answer this? How old? :dunno

so will she be 52? i think she is but im not so sure?

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: Can anyone answer this? How old? :dunno

Not quite.  110 weeks is just when two of the astronauts are home together.

You have got to find when all four are back together.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

lorynjane

Member

Registered: 2011-02-27

Posts: 13

Re: Can anyone answer this? How old? :dunno

so is it 1980 weeks later when they all r home ? and then convert that and i have my answer??

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: Can anyone answer this? How old? :dunno

Yes, that's it!

well done!

Bob

---

Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Can anyone answer this? How old? :dunno

Hi,

She will be 87.97 years old.

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"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: Can anyone answer this? How old? :dunno

hi gAr,

I fear it may be too late.  It's 'back to school after half term' here in the UK so I think lorynjane may have already had her maths lesson and handed in what she has done. 

re  http://www.mathisfunforum.com/viewtopic.php?id=15152

I wonder if the teacher has a list of them all?

re:  http://www.mathisfunforum.com/viewtopic.php?id=15155

You might like to have a try at this one.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Can anyone answer this? How old? :dunno

Hi bob,

Yes, I gave it a try. I think it's little advanced for beginners.

Last edited by gAr (2011-02-28 02:19:30)

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"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."