John was born in 19ab. The two digit number ab when divided by 2 gives his age on his birthday in 1999.

Can you tell me how old was he?

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- Dec 9th 2006, 10:13 AMgetmathA puzzle
John was born in 19ab. The two digit number ab when divided by 2 gives his age on his birthday in 1999.

Can you tell me how old was he? - Dec 9th 2006, 10:26 AMTriKri
- Dec 9th 2006, 12:33 PMSoroban
Hello, getmath!

Another approach . . .

Quote:

John was born in .

The two-digit number when divided by 2 gives his age on his birthday in 1999.

Can you tell me how old was he?

Let

He was born in the year

years later, it is 1999.

Hence: .

Therefore, he was born in ; he was in 1999.

- Dec 9th 2006, 01:45 PMOReilly
- Dec 9th 2006, 08:40 PMgetmath