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Too Old For Grandma (Posted on 2003-02-28) Difficulty: 2 of 5
"I've always been 45 years older than your Dad", said Grandma to young grandson.

"But now the two digits in my age, both prime, are the reverse of the two in your Dad's age".

How old is Grandma?

See The Solution Submitted by Ravi Raja    
Rating: 2.5000 (14 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution perhaps | Comment 11 of 16 |
Grandma is 72 years old.  Dad would then be 27.  27+45=72.  7 and 2 are both prime.
  Posted by logischer Verstand on 2004-04-26 17:09:39
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