Maths Teaser

Brightonfan1983 · Jun 21, 2012

If anyone can explain the answer to this, I'd be grateful. It's been bugging me for ages now...

albion534 · Jun 21, 2012

25 % 4 answers?

thony · Jun 21, 2012

Sergei's Celebration · Jun 21, 2012

albion534 said:
25 % 4 answers?

Have another look, there are 2 x 25%s therefore 25% can not be the answer; it should be 50% but getting the 50% answer is only a 25% chance...i think.

thony · Jun 21, 2012

albion534 said:
25 % 4 answers?

If 25% were correct, you'd have a 50% chance of picking it (as it appears twice)

HantsSeagull · Jun 21, 2012

Mmmm.....although two have the same answer there is still 4 options to choice from so I am inclined to go for 25%

happypig · Jun 21, 2012

Answering at random means picking one of the four options without knowing what it is. As two of the options are 25%, then there is a 1 in 2 chance of picking one. There is a 1 in 4 chance of picking 50% or 60%.
So the answer is 50%

JamesAndTheGiantHead · Jun 21, 2012

Where's the question? It's a play on words isn't it, not numbers.

thony · Jun 21, 2012

happypig said:
Answering at random means picking one of the four options without knowing what it is. As two of the options are 25%, then there is a 1 in 2 chance of picking one. There is a 1 in 4 chance of picking 50% or 60%.
So the answer is 50%

Why is the answer 50%? There's only a 25% chance of picking that.

thony · Jun 21, 2012

There's a 0% chance of picking 0%, as that's not one of the options given.

seagullwedgee · Jun 21, 2012

How about this one?

Me and my two flat mates were after a decent big new telly for the flat, and a mate of ours said he had seen a peach of an LED full HD 32 inch for exactly £300, and he could pick it up for us on his way home from work next day.

So in the pub that night we each gave him £100, so he could go out and buy the £300 TV.

He went to the shop, and to his delight the price had been reduced even further, to just £250. He obviously thought he would keep quiet about this further discount and pocket the £50 himself.

But his conscience got the better of him, so when he delivered the telly to us he said he got it for £250. And as £50wasn't easily divisible by 3 he said "how about I give you £10 back each, and I keep the other £20 for my trouble, time and petrol money?". And we all thought 'fair enough, he's done us a proper good turn here'.

So at the end of the day, we had each given him £100, but he had given each of us a tenner back. So each of us had parted with £90. Three times £90 is £270, add on the £20 he kept for himself, makes £290.

Hang on a minute, so where's the other tenner gone?

Glenn-Murray · Jun 21, 2012

seagullwedgee said:
How about this one?

Me and my two flat mates were after a decent big new telly for the flat, and a mate of ours said he had seen a peach of an LED full HD 32 inch for exactly £300, and he could pick it up for us on his way home from work next day.

So in the pub that night we each gave him £100, so he could go out and buy the £300 TV.

He went to the shop, and to his delight the price had been reduced even further, to just £250. He obviously thought he would keep quiet about this further discount and pocket the £50 himself.

But his conscience got the better of him, so when he delivered the telly to us he said he got it for £250. And as £50wasn't easily divisible by 3 he said "how about I give you £10 back each, and I keep the other £20 for my trouble, time and petrol money?". And we all thought 'fair enough, he's done us a proper good turn here'.

So at the end of the day, we had each given him £100, but he had given each of us a tenner back. So each of us had parted with £90. Three times £90 is £270, add on the £20 he kept for himself, makes £290.

Hang on a minute, so where's the other tenner gone?

Maybe not... The maths is wrong at the end, it's just meant to trick you into assuming it's right because until then it was reasonable. 3x100 is 300, give back him his 20 so you're at 280, then give back your three tenners which is 250 (the cost of the TV)

peterward · Jun 21, 2012

seagullwedgee said:
How about this one?

Me and my two flat mates were after a decent big new telly for the flat, and a mate of ours said he had seen a peach of an LED full HD 32 inch for exactly £300, and he could pick it up for us on his way home from work next day.

So in the pub that night we each gave him £100, so he could go out and buy the £300 TV.

He went to the shop, and to his delight the price had been reduced even further, to just £250. He obviously thought he would keep quiet about this further discount and pocket the £50 himself.

But his conscience got the better of him, so when he delivered the telly to us he said he got it for £250. And as £50wasn't easily divisible by 3 he said "how about I give you £10 back each, and I keep the other £20 for my trouble, time and petrol money?". And we all thought 'fair enough, he's done us a proper good turn here'.

So at the end of the day, we had each given him £100, but he had given each of us a tenner back. So each of us had parted with £90. Three times £90 is £270, add on the £20 he kept for himself, makes £290.

Hang on a minute, so where's the other tenner gone?

thats back to front..... 3 x 90 each = 270 minus the 20 quid your mate puts in his pocket = the cost of the TV

seagullwedgee · Jun 21, 2012

oh, come on chaps, spoiling the bloody fun, cant you play along just to hook a few in?!

JamesAndTheGiantHead · Jun 21, 2012

seagullwedgee said:
How about this one?

Me and my two flat mates were after a decent big new telly for the flat, and a mate of ours said he had seen a peach of an LED full HD 32 inch for exactly £300, and he could pick it up for us on his way home from work next day.

So in the pub that night we each gave him £100, so he could go out and buy the £300 TV.

He went to the shop, and to his delight the price had been reduced even further, to just £250. He obviously thought he would keep quiet about this further discount and pocket the £50 himself.

But his conscience got the better of him, so when he delivered the telly to us he said he got it for £250. And as £50wasn't easily divisible by 3 he said "how about I give you £10 back each, and I keep the other £20 for my trouble, time and petrol money?". And we all thought 'fair enough, he's done us a proper good turn here'.

So at the end of the day, we had each given him £100, but he had given each of us a tenner back. So each of us had parted with £90. Three times £90 is £270, add on the £20 he kept for himself, makes £290.

Hang on a minute, so where's the other tenner gone?

It's an incomprehensible, unsolvable, spooky mystery.

peterward · Jun 21, 2012

Your youngest sister Claire is currently 8 years old. You are three times as old as claire. How old will you be in the future when you are twice as old as Claire?

JamesAndTheGiantHead · Jun 21, 2012

peterward said:
Your youngest sister Claire is currently 8 years old. You are three times as old as claire. How old will you be in the future when you are twice as old as Claire?

32

hawhaihofofw (Had to add that as the message was too short)

peterward · Jun 21, 2012

dingodan · Jun 21, 2012

Number of saves by Kuszczak for the Albion next season

X (multiplied by)

Number of goals scored by Michael Owen for the Albion next season

Zen.

Greg Bobkin · Jun 21, 2012

What's the question?

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