Jump to content

Help Please!!


Guest roger_kang

Recommended Posts

Guest roger_kang

What number should replace the question mark?

Tis is driving me crazy. I can't see no pattern.

 

389----21----492

|.....\......./.....|

|......\...../......|

|.......\.../.......|

16........?........10

|......./...\.......|

|....../.....\......|

|...../.......\.....|

613----5----841

help.GIF

Link to comment
Share on other sites

  • 13 years later...
On 21/5/2005 at 7:40 AM, Guest roger_kang said:

What number should replace the question mark?

Tis is driving me crazy. I can't see no pattern.

 

389----21----492

|.....\......./.....|

|......\...../......|

|.......\.../.......|

16........?........10

|......./...\.......|

|....../.....\......|

|...../.......\.....|

613----5----841

help.GIF

The answer is 2. 

In each row middle number is sum of all the odd numbers in the circles either side.

Link to comment
Share on other sites

13, not 2-- the sums of odd numbers are along the lines, so the center number should be the sums of the diagonally opposite odd numbers.  In both diagonal directions the odd numbers are 9, 3 and 1 which add to 13.  That is the odd numbers in 613 add to the odds in 492, and the odds in 389 add to the odds in 841.

Edited by OldChemE
fixed a typo
Link to comment
Share on other sites

3 hours ago, OldChemE said:

In both diagonal directions the odd numbers are 9, 3 and 1 which add to 13.

Good point! But could the answer also be 26? 
Extract all odd numbers from circles connected via diagonal lines: (389)-->(3+9), (492)-->(9), (841)-->(1), (613)-->(1+3)
Sum: (3+9)+(9)+(1)+(1+3)=26 
Why not use all odd numbers from both diagonals?

 

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.