Re: Weekend IQ for you :)

[LSETech Contributor]

A x (A-1) = B

3 x (3-1) = 6

Thank You.
   

[sivaratna]

Comment about your answer

I think it is 15. As 6=30, so 3 should be 15.
And they have purposefully avoided 4. As 8 is there.

[KDDNDTop contributor]

Comment about your answer

I think it is 15. As 6=30, so 3 should be 15.
And they have purposefully avoided 4. As 8 is there.

Siva if it so.....
then it says 8 = 56 and 5 = 20,
then 8 - 5 = 56 - 20
so 3 = 36
so i guess your suggestion might not correct.................  

[කිත්සිරි ද සිල්වාTop contributor]

Answer is 6
(5 x 4 = 20 / 4 x 3 = 12 / 3 x 2 = 6)
The natural order, I believe.  
Unfortunately the 4 has been omitted with purpose.

[yaka]

no the answer is 12

[balapasTop contributor]

Answer is 6. If you look at the order

8x7 =56
7x6 =42
6x5 = 30
5x4 =20
4x3 =12
3x2 = 6

4x3 is not there if you look at the picture so thats the trick there not identifying the trend there. If you miss it will get 12 or 9. You dont look at 3 and go for 4x3 =12 looking at the trend. 9 when you see 3 and think 3x3 = 9 but dont realize 4 is missing.

BTW LSE you got a formula what is it?

[LSETech Contributor]

Friend bala,

Assume we can find any value according to the sequence by substitute values in to that formula, like you demonstrate in your example.

Note:
Friend Shasi, nice work. Waiting for your answer and for a new IQ.

Thank You.
      

A x (A-1) = B

3 x (3-1) = 6

Thank You.

Answer is 6. If you look at the order

8x7 =56
7x6  =42
6x5 = 30
5x4 =20
4x3 =12
3x2 = 6

4x3 is not there if you look at the picture so thats the trick there not identifying the trend there. If you miss it will get 12 or 9. You dont look at 3 and go for 4x3 =12 looking at the trend. 9 when you see 3 and think 3x3 = 9 but dont realize 4 is missing.

BTW LSE you got a formula what is it?

[balapasTop contributor]

Friend bala,

Assume we can find any value according to the sequence by substitute values in to that formula, like you demonstrate in your example.

Note:
Friend Shasi, nice work. Waiting for your answer and for a new IQ.

Thank You.
      

A x (A-1) = B

3 x (3-1) = 6

Thank You.

Answer is 6. If you look at the order

8x7 =56
7x6  =42
6x5 = 30
5x4 =20
4x3 =12
3x2 = 6

4x3 is not there if you look at the picture so thats the trick there not identifying the trend there. If you miss it will get 12 or 9. You dont look at 3 and go for 4x3 =12 looking at the trend. 9 when you see 3 and think 3x3 = 9 but dont realize 4 is missing.

BTW LSE you got a formula what is it?

Thanks LSE.

[sashimaalTop contributor]

Most of you have got it right

Girihell, Seyon, Serene, Chinwi, Seek, KDDND, LSE, Kithsiri, Bala have got it right

LSE's equation can be used to get the answer: A x (A-1) = B

4=12 is missing and the answer is 6

As Bala (and many others) has put:

8x7 =56
7x6 =42
6x5 = 30
5x4 =20
4x3 =12
3x2 = 6

[SrirangaVeteran]

Thanks Sashi.

Here is another one. (Brainteaser for the weekend)

Given these equations, what does 4500 equal?
8898=7
4566=2
1203=1
2313=0
4566=2
5464=1
7774=0
1003=2
9856=4
9955=2
1886=5
1231=0
8764=3
4500=

[girihell]

this might take some time   

Thanks Sashi.

Here is another one. (Brainteaser for the weekend)

Given these equations, what does 4500 equal?
8898=7
4566=2
1203=1
2313=0
4566=2
5464=1
7774=0
1003=2
9856=4
9955=2
1886=5
1231=0
8764=3
4500=

[sashimaalTop contributor]

2

[SrirangaVeteran]

2

Correct.  

More fun
follow the link.

http://www.seriousshops.com/blogs/post/Clever-Brain-Teasers-and-Witty-Riddles-for-Kids-and-Adults.aspx

[balapasTop contributor]

Thanks Sashi.

Here is another one. (Brainteaser for the weekend)

Given these equations, what does 4500 equal?
8898=7
4566=2
1203=1
2313=0
4566=2
5464=1
7774=0
1003=2
9856=4
9955=2
1886=5
1231=0
8764=3
4500=

Seems not a mathematical question. Need to think out of the box. Anyways if subjects like maths and physics made fun would have more followers. Watch this if anyone got time. Really interesting how he has put it. https://www.youtube.com/watch?v=0NbBjNiw4tk Michio Kaku is up there with Stephen Hawkings as theoretical physicists. He may appear on comedy series The Big Bang theory like Prof Hawkings.

[girihell]

ha haa that's some out of the box thinking
never thought that way, i was just trying to do it mathematically  

2

Correct.  

More fun
follow the link.

http://www.seriousshops.com/blogs/post/Clever-Brain-Teasers-and-Witty-Riddles-for-Kids-and-Adults.aspx

[sashimaalTop contributor]

[කිත්සිරි ද සිල්වාTop contributor]

8.

[Ethical TraderTop contributor]

10

[sereneTop contributor]

10

[sashimaalTop contributor]

Briefly explain how you arrived at the figure

Rarely there can be alternate answers as well.

[sereneTop contributor]

Briefly explain how you arrived at the figure

Rarely there can be alternate answers as well.

Sum of four numbers in each circle = 26

[sashimaalTop contributor]

Ok, clue: it's a single digit number. So it's not 10

[sereneTop contributor]

Ok, clue: it's a single digit number. So it's not 10

6   

[sivaratna]

9

[Ethical TraderTop contributor]

Briefly explain how you arrived at the figure

Rarely there can be alternate answers as well.

I see two clear patterns in there.

First, sum of four numbers in the first two circles adds up to 26. Logically, you need to add 10 to arrive at 26 in the third circle.

Second, when you add the two numbers diaganally in the first and second circles separately at a time (top right + below left, below right+top left) one sum increases by one while the other decreases by one in the second circle. You need to put 10 in the third circle to see the same pattern.

So it can't be a single digit one.