29 10 = 2x 1455 = 2x3x 485 = 2x3x 5x 97

So 2910 = 2x15x97 = 6x5x97 =10x3x97.

According to the actual situation, we should take 29 10=2x 15x97.

That is to say, Zhang Ming should be 97 points, second, 15 years old.