Solved by preschoolers in 5 mins

4 stars

8809 = 6

7111 = 0

2172 = 0

6666 = 4

1111 = 0

3213 = 0

7662 = 2

9312 = 1

0000 = 4

2222 = 0

3333 = 0

5555 = 0

8193 = 3

8096 = 5

7777 = 0

9999 = 4

7756 = 1

6855 = 3

9881 = 5

5531 = 0

2581 = ?

 

Answer below


2581 = 2.  Why?

 

It's the number of circles or holes that are in the number.  

For example

8=2
1=0
9=1

etc!

 

 

 

Difficulty
  • Hard
Type
  • Mathematical
  • Visual
Submit your vote:

    

Comments

LOL, that was really hard, but was actually pretty fun- of course, i couldn't solve it though
- pielover (19 Jul 2013)

I got it :):):):)
- (14 Aug 2013)

What the hell? Some of the sequence problems have crazy solutions!
- Vinay V (27 Jun 2014)

count the hole or o in each number which gives the answer example 8 has 2 holes
- aus (3 Jul 2014)

Post your own comment

Name:
URL:
Anti-spam check
To prove you are human, what traffic light color means stop?(Hint: 3 letters, beginning with R)
Comments:
Note: comments may be edited and will not appear until approved