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Lots of questions on different subjects where you have to try to answer the latest question and if you are right then its your turn to ask the next question.

Moderators: playgirl, JUS, rodbox

#108847 by Tallscot
Fri Aug 20, 2010 10:14 pm
Maths is way short of being my best subject, but..

I think there are 10 combinations of 2 boxes, so as there are 2 boxes I'll half it and say 5/1 for 1 box and 10/1 for both?

#108850 by pulse876
Sat Aug 21, 2010 12:42 am
There are ten (5!/(2!*3!))possible combinations for the last two boxes. Of the ten, three include neither the £100k nor the £250k boxes, one includes both those boxes and six include just one of the £100k and the £250k boxes.

So the chances of having one or both of the £100k and £250k boxes in the last two are 70%.

#108859 by wildrover
Sat Aug 21, 2010 11:38 am
Pulse is correct - there are 10 combinations and you can have the £250K box with any one of the other 4 boxes and then the £100K with any of the other 4 boxes less the combination of £100K and £250K which you've already counted - so that's 7/10 or 70%.

On a general point, Pulse's formula is correct - if you choose m objects from a total number of n objects then the number of different ways you can choose them is [n!/m!(n-m)!].

So if I'd asked the same question but the player had both big value boxes at the 8 box stage then the number of ways of choosing 2 boxes from 8 is [8!/2!6!] which is 28 and there are 13 possible combinations containing one or both boxes so the probability would be 13/28.

#110263 by tonto
Tue Nov 02, 2010 4:21 pm
What is the square root of 729?

#110280 by JUS
Wed Nov 03, 2010 2:06 am
27 ish

#110289 by tonto
Wed Nov 03, 2010 11:07 am
:D ish

#110300 by JUS
Wed Nov 03, 2010 3:12 pm
How about the square root of 3136?

#110312 by tonto
Wed Nov 03, 2010 11:47 pm
56ish :wink:

#110316 by JUS
Thu Nov 04, 2010 12:17 am
indeedy ish :wink:

#110321 by pulse876
Thu Nov 04, 2010 1:22 am
Or even -27 and -56 respectively.

#110324 by Buzzie
Thu Nov 04, 2010 12:33 pm
This may have been posted before so apologies if it has but I like it!

The day before yesterday I was 7 years old. Next year I will be 10 years old.

What is the date today & when is my birthday?

#111016 by Quiz master
Sun Nov 28, 2010 1:23 pm
Let's assume that today is 1-1-10
the day before yesterday, your birthday on 30-12-2009, you were 7
Yesterday, your birthday on the 31-12-2009 you became 8.
Today, on the 1-1-2010 you are still 8.
So this year on the 31-12-2010 you become 9.
So next year on the 31-12-2011 you will be 10

It took me a long time to work it out - I hope I'm right :oops:

In geometry, what word describes two or more circles which have the same centre?

#111020 by JUS
Sun Nov 28, 2010 1:38 pm

#111022 by Quiz master
Sun Nov 28, 2010 1:41 pm
Well done JUS :)

#111023 by JUS
Sun Nov 28, 2010 1:51 pm
feel free anyone, I've not got any maths puzzles :oops:
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