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?
Hello, getmath!
Another approach . . .
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.