There is a problem to solve the math problem with many trophies in grade one. (28 points, 7 points for each question) 1. There is a giraffe in the zoo. Its age is obtained by subtracting the smallest two digits from the largest two digits and then subtracting the largest one digit. ...

The first one has a circle,

The second one has three circles,

The third one has six circles, every four has ten circles, and the fifth one has fifteen searches ...-The first one is 1, the second one is 1+2, and the third one is 1+.