1.Forever and always
Nine is my favourite number. In Chinese culture, number nine means ever-lasting. It is also the highest single-digit number before 10. It stands for completeness and eternity.
Sarah So, 16, St Margaret's Girls' College
2.On top of the world
Of all the numbers, my favourite is one. This is because in examinations and competitions, number one represents the top. During every exam and competition, I work hard and do my best to be number one. Many local students aim to be the top in whatever they do. Being number one drives people to improve themselves. As Number one can always push me to do better, so it is my favourite digit.
Katrina Lo, 13, King Ling College
3.Money on my mind
My favourite number is definitely 18. In Chinese culture, 18 symbolises becoming wealthy and that's what I want. What's more, my birthday falls on the 18th - I think there is a strange, almost miraculous connection between me and 18.
Timophy Pit Hok-yau, 15, King Ling College
4.It's the magic number
My favourite number is three, because while two is company, three is a crowd, and when there's a crowd, there's three times the laughter, and three times the fun. It also creates perfect triplets when it comes to storytelling, writing and poetry.
Belinda Ng, 15, South Island School
5.Give it your all
My favourite number is 100. My mother always told me that if I promise to do something, I have to always give it 100 per cent effort. After the work is done, whether it is good or bad, as long as I think I have given 100 per cent, I will be happy.
Aeren Man, 14, Law Ting Pong Secondary School
6.Just google it
Googolplex. It's a very large number - one followed by 100 zeros - which gave the world's most popular website, Google, its name. It's simply awesome. Don't ever try writing this number; there isn't enough space in the universe!
Tinaz Mirza, 16, South Island School
Five brings a lot of happiness to people. For example, when people succeed, they give each other a "high five". Five is also meaningful to me. My birthday falls in May, the fifth month of the year. My brother's birthday is also in May, while my sister was born on the fifth of a month. Also, my parents' wedding anniversary is on January 5. I think the number five binds our family together.
Sammi Hui, 15, Kowloon True Light School
8.Strike a balance
Numbers make up our lives. We count, learn and discuss numbers every day. Everyone has one lucky or favourite number - mine is 11. In numerology, it is a balanced number of vision and equality; in tarot cards, it means strength but some consider it a symbol of rebellion. It is a very special number.
Dragon Yu Yiu-ting, 14, Law Ting Pong Secondary School
9.Nothing is beautiful
My favourite number is 0. It represents nothing at all, but is one of the most important numbers. How could we express this year, 2015, without it? Or buy something without having to reach into our purses for 10-cent coins? It's the easiest number to work with (using addition, subtraction, multiplication and so on), yet one of the hardest to understand - how do you divide by 0? This digit might seem straightforward, but it has puzzled us for years.
Charlotte Chan, 16, German Swiss International School
10.The perfect score
My favourite number is 10 - it symbolises wholeness in Chinese culture. What's more, 10 out of 10 means full marks, which is great for students. It is also an even number, which I like. Ten is also very useful when celebrating anniversaries and birthdays
Jordan Chan Wai-tsun, 12, King Ling College
Next week is the first day of spring! For our next Top 10, tell us your favourite thing about the season. Send your answers, together with your name, age and school, to reporters.club @scmp.com with "Top 10: Spring" in the subject field. The best answers will be published on the next Top 10 page!