Periodically 79
I am periodically the number 79. Long ago some attempted to make me from 29, but learned it couldn't be done. If you add me to 80 I appear to be 47 temporarily.
What am I?
Check Braingle.com for the answer.
from Braingle's Teasers http://ift.tt/1fYO2jw
via 3d wooden brain teasers from craftypuzzles.com
I am periodically the number 79. Long ago some attempted to make me from 29, but learned it couldn't be done. If you add me to 80 I appear to be 47 temporarily.
What am I?
Check Braingle.com for the answer.
from Braingle's Teasers http://ift.tt/1fYO2jw
via 3d wooden brain teasers from craftypuzzles.com
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