I have been given 24 hours to solve this.
So, my friend has given me 10 examples.
$$1024 = 1$$
$$1000 = 3$$
$$2880 = 5$$
$$6591 = 2$$
$$2113 = 0$$
$$1345 = 0$$
$$1987 = 3$$
$$8888 = 8$$
$$5632 = 1$$
$$6124 = 1$$
So, the question is
$$ 2456=?$$
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$\begingroup$ Okk, I didn't know that this was already posted beforehand... I would delete it. Sorry for any inconvenience.. $\endgroup$– SidAug 28, 2016 at 9:48
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$\begingroup$ No need to delete it. Nothing wrong with leaving a dupe here. $\endgroup$– MithicalAug 28, 2016 at 9:49
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$\begingroup$ You could now ask your friend to solve a variation of a similar puzzle I posted :) $\endgroup$– Jonathan AllanAug 28, 2016 at 13:51
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$\begingroup$ @JonathanAllan Yeah... maybe I should give him a month time for that.. $\endgroup$– SidAug 28, 2016 at 14:14
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1 Answer
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0
The answer is:
1
Reason:
the result is the number of round holes in the digits.
0 - one hole, 1 - zero holes, 2 - zero holes, 3 - zero holes, 4 - zero, 5 - zero, 6 - one hole, 7 - zero, 8 - two holes, 9 - one hole.
