Xiaoming's weight-

Xiaoming's student number is-

Xiaoming's blood type is-

Xiao Ming's first math exam = height and weight kg+ student number (weight is directly proportional to height)

Suppose Xiaoming's height 160cm, weight 50kg, student number 3, blood type O.

Xiaoming got160-50+3 =113 in the first math exam.

So Xiao Ming got 1 13 in the first O-type math exam.

(Haha, pure entertainment)