The following text is for numbers 22 - 25.

    One day, when I was ten years old, my father bought an old motorcycle. That was "Honda 75". I think it was a small light object and easy to ride. I persuaded my father to teach me to ride "Honda 75". Firstly, my father refused my request and promised that he would teach me two or three years later, but I still whimpered. Finally, my father surrendered and promised to teach me. He began to teach me to ride the motorcycle around a field in my village. My father was very patient to give me some direction. I was very happy when I realized my ability to ride a motorcycle. "Yes, I can".

    One day later, when I was alone at home, I intended to try my riding ability. So, I tried bravely. All ran fluently in the beginning, but when I was going back to my home and I passed through a narrow slippery street, I got nervous. I lost my control and I fell to the ditch.

    After that, I told my father about the last accident. I imagined my father would be angry and never let me ride again. But the reality is exactly the contrary, my father was very proud of me. He just gave me some advice and since that accident, I got my father's permission to ride a motorcycle.

How old was the writer when his/her father bought an old motorcycle?