When was the last time all the digits in the date (dd-mm-yyyy) were a prime number? When will the next one be? Notice that it is simply digits, and not the whole number.
Ignore any leading zeroes.
AnswerThe last time all the digits in the date (dd-mm-yyyy) were a prime number on 27-7-777 and the next one will be on 2-2-2222
Note that 1 is not a Prime number. And single digit prime numbers are 2, 3, 5 and 7.
See another brain teaser just like this one...
Or, just get a random brain teaser
If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.
Back to Top