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Admin
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Mensa Mind teaser

on Sun 24 Dec - 20:02
First topic message reminder :

1}I know MYG likes a puzzle so specialy for her and everyone else of course.

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?


2}Take 9 from 6, 10 from 9, 50 from 40 and leave 6.

How Come ??


Last edited by Admin on Thu 4 Jan - 21:45; edited 1 time in total

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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 14:39
I would've thought the maths is, the sum of the two speeds divided by 2.

35 + 14 = 49 divided by 2 = 24.5.

Is that too simplistic?
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Re: Mensa Mind teaser

on Wed 3 Jan - 14:42
Looking at the answer that is given by mensa I'd say yes. Unless mensa are wrong Very Happy
myg
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Re: Mensa Mind teaser

on Wed 3 Jan - 17:17
As they travel for a longer time at the slower speed I think the average is 20mph.
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Re: Mensa Mind teaser

on Wed 3 Jan - 17:19
The brains of the outfit again, correct MYG cheers
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Re: Mensa Mind teaser

on Wed 3 Jan - 17:29
Thanks Admin, I am enjoying these mindteasers.I am also glad to see a few more members joining in.
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Re: Mensa Mind teaser

on Wed 3 Jan - 17:44
Here's a brian bashing one

In a department store TREE DECORATIONS are in department number 24, FAMILY GAMES are in department 13 and FATHER CHRISTMAS is in department 9.

What department are TEDDY BEARS in?
myg
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Re: Mensa Mind teaser

on Wed 3 Jan - 17:57
This is another alphabet numerical sum.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 18:41
TEDDY BEARS = 22
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Admin
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Re: Mensa Mind teaser

on Wed 3 Jan - 18:43
Spot on RMJ

22. The alphabetical values of the two initials are added together to give the department number.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 18:50
Exactly so Mrs A.

Quite pleased with my deducing skills.
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Re: Mensa Mind teaser

on Wed 3 Jan - 18:54
A thrifty person saves candle stubs to form into new candles.

Seven stubs are needed to make each new candle.

If there are 241 stubs, how many candles can possibly be made in total?
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 18:59
Surely it's simple maths.

241 divided by 7 = 34, and a bit.
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:00
Apparently not
myg
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:03
There will be extra stubs from the 34.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:12
I think I know where I've gone wrong.

Obviously when you have made those 34 candles they will be

lit and will create new stubs.

34 stubs can then be made into 4.86 new candles, do we round up to 5?

Those 5 would not make another complete candle.

Answer is 34 + 5 = 39.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:14
@myg wrote:There will be extra stubs from the 34.

Sorry myg, I was doing my sums and typing up while you were posting.

You've obviously come to the same conclusion as me
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:14
Close
myg
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:44
the extra 5 candles also have stubs to make one more candle with the two left over Total 40
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:49
Spot on MYG. Well done Ray you were on the right track.


Last one for today

Add together three numbers each time to score 45.

Each number can be used as many times as you wish.

How many different combinations are there?

5 10 15 20 25
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 19:52
Of course myg, I get it now.

There were 2 left over from the original 241.

34 x 7 = 238.

5 + 2 = 7 = another candle = 40 total.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 20:03
Can the numbers be used more than once in each separate sum of three,

for example 15 + 15 +15 = 45, or can they only be used once in each sum.

for example 5 + 15 + 25 = 45.
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Re: Mensa Mind teaser

on Wed 3 Jan - 20:13
Yes
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 20:25
This is one of those that gets you mesmerised.

I keep repeating the same additions over and over.

5 + 15 + 25 = 45

10 + 15 + 20 + 45

15 + 15 + 15 = 45

5 + 20 +20 = 45

10 + 10 + 25 + 45

Is my best shot.

Plus I need to rest my brain cell for the cryptic at eight o'clock prompt.
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Re: Mensa Mind teaser

on Wed 3 Jan - 20:26
Yes there are 5 you'll be pleased to know. Very Happy
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raymyjamie
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Re: Mensa Mind teaser

on Wed 3 Jan - 20:51
I was struggling to come up with new ones, so put it

down to brain fatigue LOL.
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