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Admin
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Mensa Mind teaser

on Sun 24 Dec - 19:02
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 - 20:45; edited 1 time in total

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raymyjamie
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Re: Mensa Mind teaser

on Thu 8 Mar - 12:42
@Gassey wrote:Close to it Ray
Spot on myg

Not my finest bit of logic Gassey.

We missed you on last night's cryptics.
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Re: Mensa Mind teaser

on Thu 8 Mar - 16:18
Find a number less than 100 that is increased by one-fifth of its value when its digits are reversed.
myg
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Re: Mensa Mind teaser

on Thu 8 Mar - 18:46
45    a lot of these number teasers involve 9 as a factor
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Admin
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Re: Mensa Mind teaser

on Thu 8 Mar - 18:53
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Re: Mensa Mind teaser

on Mon 19 Mar - 15:11
In an assessment the first 17 people scored an average of three points each. After a further 30 people had taken the assessment the average score rose to nine points each. What was the average number of points scored by the last 30 people only?
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Re: Mensa Mind teaser

on Wed 21 Mar - 13:02
@Admin wrote:In an assessment the first 17 people scored an average of three points each. After a further 30 people had taken the assessment the average score rose to nine points each. What was the average number of points scored by the last 30 people only?

Anyone havbing a go at this?
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raymyjamie
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Re: Mensa Mind teaser

on Wed 21 Mar - 20:40
I've had several 'looks' at it.

I'm having another 'go' now.
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raymyjamie
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Re: Mensa Mind teaser

on Wed 21 Mar - 20:52
Average = Total number of points divided by number of people.

Therefore total points = Average x number of people.

Total points for the first 17 = 17 x 3 = 51

Total points for first 47 = 47 x 9 = 423

Average for last 30 = 423 – 51 / 30 = 372 / 30

Average for last 30 = 12.4


Well, I found that strangely easy and straightforward.

I may be wrong of course Embarassed Laughing
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Admin
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Re: Mensa Mind teaser

on Wed 21 Mar - 20:56
No you're right. Very Happy
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raymyjamie
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Re: Mensa Mind teaser

on Wed 21 Mar - 21:07
Well, I is quite chuffed with that, cos on the surface

it seemed hard to do, but when you analise it, it's

fairly easy really.
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Re: Mensa Mind teaser

on Wed 21 Mar - 21:15
well done you. Is there another one you might like to look at? I cant remember if I posted another. My connection is playing up something awfull
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raymyjamie
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Re: Mensa Mind teaser

on Wed 21 Mar - 21:30
I've found on 'Fun in the afternoon2'.

First reaction is, IT'S UNSOLVABLE!!!!!!!! confused Laughing
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Re: Mensa Mind teaser

on Fri 23 Mar - 8:56
2+3=8,
3+7=27,
4+5=32,
5+8=60,
6+7=72,
7+8=??

Can you solve this?
myg
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Re: Mensa Mind teaser

on Fri 23 Mar - 14:16
6x7+7x8=98
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Admin
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Re: Mensa Mind teaser

on Fri 23 Mar - 15:06
Bob on MYG

98

2+3=2*[3+(2-1)]=8
3+7=3*[7+(3-1)]=27
4+5=4*[5+(4-1)]=32
5+8=5*[8+(5-1)]=60
6+7=6*[7+(6-1)]=72
therefore
7+8=7*[8+(7-1)]=98
x+y=x[y+(x-1)]=x^2+xy-x
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Admin
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Re: Mensa Mind teaser

on Sun 1 Apr - 18:20
3 and 6 = 918

5 and 2 = 710

1 and 8 = 98

What does 4 and 4 =?
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raymyjamie
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Re: Mensa Mind teaser

on Sun 1 Apr - 18:50
4 and 4 = 816

The first figure is the sum of the two numbers, and the following

numbers are the product of the two numbers.
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Re: Mensa Mind teaser

on Sun 1 Apr - 18:56
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Re: Mensa Mind teaser

on Sun 8 Apr - 10:10
A car meter reading shows 72927 miles a palindromic number.
what is the minimum number of miles you would need to travel to see another palindromic number on the car meter reading?














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mache
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Re: Mensa Mind teaser

on Sun 8 Apr - 11:08
110
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Admin
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Re: Mensa Mind teaser

on Sun 8 Apr - 17:05
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Re: Mensa Mind teaser

on Mon 9 Apr - 23:34
Assume you are using a basic calculator and press the numbers in the order shown, replacing each question mark with a mathematical sign.

Plus, minus, multiply and divide can each be used once only.

In which order should they be used to score 24?



2 ? 8 ? 6 ? 9 ? 3 = 24
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Re: Mensa Mind teaser

on Tue 10 Apr - 11:00
2-8/6+9x3= 24 as a calculator will do the steps in order.
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Admin
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Re: Mensa Mind teaser

on Tue 21 Aug - 14:08
What number should replace the question mark?

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Re: Mensa Mind teaser

on Tue 21 Aug - 17:46
saggy trousers
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Re: Mensa Mind teaser

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