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The planning takes a top-down approach. It starts with the principles that seem right to me and ends with the specific tasks. Reflecting on how I did planning, I put too much emphasis on the details of a specific goal without explaining the motivation and general theme behind it. Principles

New York is a state Friends send me news on winter storm. In New York City, there was little snow. I learn that the total area of New York State is 141,000 KM2. That of New York City is 780 KM2. Why East Coast is Colder Than West Coast

Don’t ask me why I would self-learn mathematics because sometimes I feel like it is a waste of time especially when I found the materials difficult. I feel that maths is the foundation of today’s science, and therefore, important. I feel that I lack training in maths. Not

This is just a sharing of an interesting paradox. I am definitely not an expert in Set Theory. If you want to learn more about the paradox, you may refer to the formal text on Set Theory. Consider the barber paradox in the picture above. The question asks “who shaves

Most financial professionals are familiar with the concept of the time value of money and the respective formulas to derive the future value, present value, rate, etc. While Excel, Google Sheets, or financial calculators offer convenient functions, not every one of us knows what equation is being solved and how

I got Covid this week and still tried to keep doing something else apart from my work. So, I continue reading the book The Theory of Interest by I.Fisher I think I have never thought of defining income. What is income? Income to a labourer like myself means the

I am currently working in the lending business. We charge borrower interest. Recently, I am tasked to work on PnL, and interest loss. But I have little understandings on interest. Why is there an interest? What is interest? How does it determined? The questions came into my mind when I