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Number Donuts (Posted on 2019-04-15) Difficulty: 2 of 5
Solve this logic number sequence puzzle

f(2202)=1
f(1999)=3
f(7351)=0
f(6666)=4
f(8080)=6
f(9068)=5
f(2386)=?

No Solution Yet Submitted by Danish Ahmed Khan    
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Solution Explanation For Puzzle Answer Comment 4 of 4 |
(In reply to Puzzle Answer by K Sengupta)

Here, f(x) = #closed loops in x, where x is a positive integer

Now, we observe that:
#closed loops in 2202 is 1, so f(2202)=1
#closed loops in 1999 is 3, so f(1999)=3
#closed loops in 7351 is 0, so f(7351)=0
#closed loops in 6666 is 4, so f(6666)=4
#closed loops in 8080 is 6, so f(8080)=6
#closed loops in 9068 is 5, so f(9068)=5

Now, #closed loops in 2386
= #closed loops in 8+#closed loops is 6
=2+1
=3

  Posted by K Sengupta on 2022-03-17 02:37:06
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