My 1st animation, funny

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Cheryl's Birthday Problem (from SASMO 2015) and Solution

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Hello! Nat here, and in this blog, I am going to discuss and give the solution to the famous Cheryl birthday problem. This was popular because it is a difficult logic puzzle and involving the ability of carefully tracking down hints in the conversation and working with only a small amount of data. Here’s the question: Albert and Bernard just became friends with Cheryl, and they want to know when her birthday is. Cheryl gives them a list of 10 possible dates. May 15           May 16           May 19 June 17          June 18 July 14           July 16 August 14       August 15       August 17 Cheryl then tells Albert and Bernard separately the month and the day of her birthday respectively. Albert: I don’t know when Cheryl’s birthday is, but I know that Bernard doesn’t know too. Bernard: At first I don’t know whe...
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What is Inertia?

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Have you ever felt like you are being pushed forward when your car brakes suddenly? This is caused by inertia. Inertia is a tendency of an object to maintain its speed. In other words, the object wants to keep a constant speed. If you push a brick along the floor (assuming there is no friction) , then the brick will go on and on and on until someone stops it. Maybe you might want to complain: But when I move bricks across the floor in real life, then why does it keep stopping? This is because there is opposing force acting on the brick known as friction. Friction is a force that is caused by rubbing 2 objects together. It can also create heat. Long time ago, people said that objects have a tendency to stop. Then, in the 1700s, Sir Isaac Newton discovered inertia and proposed that objects actually have a tendency to maintain their speed. Eventually, this is also another of Newton’s laws. I’m quite sure that I will continue to make blogs about physics, science, theo...
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Math Calculations: Simplified --- Part 2

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This is part 2 of the Math Calculations: Simplified blog. Welcome back! This time I’m going to share tricks about counting squares such as 41 2 or 52 2 .  There are 2 simple methods that I am going to explain. Here is the first one: METHOD  1 For numbers that begin with 1, the formula is simple:  (N-1)²+ (2N-1).  For example, let’s calculate 51². The equation becomes (50)² + (101). It is now easy to figure out the solution, which is 2601. This method makes it much easier to do these types of calculations rather than using the traditional method of carry-multiplying. Next, we have the 2 digit numbers that begin with 9. We can figure this out by using pretty much the opposite of the method used to calculate the square of one digit numbers. The formula: (N+1)² - (2N+1). Let’s use 29² as an example. We put this into the equation, which makes it (30)² - (59). That leads to a solution of 841. This method also helps with these types of calculations. ...
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