HELLO!!!
Today I won soccer!!! YEET!!! Also, during assembly, someone showed us a list of unsafe passwords. And guess what??? Mine is in there!!! AHHHHH!!! PANIC!!!
Wednesday, 7 August 2019
Sunday, 4 August 2019
5/8/2019
I’m sad. I can’t find my HW IN file!!! (Please comment if you can find it)
Anyway, today I LOST a match in soccer against the other team. 5 - 4. Seriously!!! Just 1 freaking point. All those shots are always out, out, and out. !!! Looks like i'll have to upgrade my skill.
Anyway, today I LOST a match in soccer against the other team. 5 - 4. Seriously!!! Just 1 freaking point. All those shots are always out, out, and out. !!! Looks like i'll have to upgrade my skill.
4/8/2019
For P4 Gen/Fai:
Please finish your RRJ by tomorrow or you will be dead(I am doing it)
For P4 Gen/Fai/Pat
Recorder bring (I wrote this only because I have forgot to bring my recorder 4 times in a row)
For everyone
Please also note that I will try to post something every day but don't be shocked if I did not log in on a day. I must be busy.
Please finish your RRJ by tomorrow or you will be dead(I am doing it)
For P4 Gen/Fai/Pat
Recorder bring (I wrote this only because I have forgot to bring my recorder 4 times in a row)
For everyone
Please also note that I will try to post something every day but don't be shocked if I did not log in on a day. I must be busy.
Saturday, 3 August 2019
Squaring numbers. FAST.
Do you remember about your friends keep on mentioning about algebric formulas? If not, here is a few:
(X+Y)(X+Y)=X(X)+Y(Y)+2XY
(X-Y)(X-Y)=X(X)+Y(Y)-2XY
X(X)-Y(Y)=(X-Y)(X+Y)
...
There are many more! However, today, we will be only focusing on one. The third one stated over there. Now, let us go into the secrets of squaring mathematical numbers.
Your number X, is going to be squared. Let's say if X is 68. Then let us make Y = 2. As 68+2 = 70, it will be easier to calculate as it can be split into 7 * 10. In the formula
X(X)-Y(Y)=(X-Y)(X+Y), we can change it to
X(X)=(X-Y)(X+Y)+Y(Y) where X is our number that is going to be squared. So, with our example, 68, let's test this out.
68(68)=(68-2)(68+2)+2(2)
=68(68)=(66)(70)+4
=68(68)=4620+4
=68(68)=4624
Now, let's check! Correct! Don't you see how efficient it was? Also, for Y, try and pick the lowest value for it but still when you add or subtract Y to/from X, we get a number divisible by 10.
Credit: https://www.youtube.com/watch?v=_FoONg5Meyc
(X+Y)(X+Y)=X(X)+Y(Y)+2XY
(X-Y)(X-Y)=X(X)+Y(Y)-2XY
X(X)-Y(Y)=(X-Y)(X+Y)
...
There are many more! However, today, we will be only focusing on one. The third one stated over there. Now, let us go into the secrets of squaring mathematical numbers.
Your number X, is going to be squared. Let's say if X is 68. Then let us make Y = 2. As 68+2 = 70, it will be easier to calculate as it can be split into 7 * 10. In the formula
X(X)-Y(Y)=(X-Y)(X+Y), we can change it to
X(X)=(X-Y)(X+Y)+Y(Y) where X is our number that is going to be squared. So, with our example, 68, let's test this out.
68(68)=(68-2)(68+2)+2(2)
=68(68)=(66)(70)+4
=68(68)=4620+4
=68(68)=4624
Now, let's check! Correct! Don't you see how efficient it was? Also, for Y, try and pick the lowest value for it but still when you add or subtract Y to/from X, we get a number divisible by 10.
Credit: https://www.youtube.com/watch?v=_FoONg5Meyc
Mind reading
Do this equation with a random 2-digit number(more than 10) and i'll guess the end product.
(e.g, (66 * 12)/36=22)
Your answer should be 22. If not, please tell me in the comments and I will see if you had a calculation error or something.
Now time for me to explain why this works.
You see, in the first instruction, I covered over about you having the two same digits in your number before continuing. As you know, if there are two of the same digits in a two digit number, it is divisible by 11. So, we will call this number 11x. The last digit stands for 1x while the first digit stands for 10x. Next, let us take the sum of the two numbers. Simple. Just 2x. Lastly, let us take the product of the two digits. Also quite simple. Just x(x). Now, let us take:
(x-y)/z
Easy. Just take (11x(2x))/x(x). Looks tough right? Don't worry, I have simplified it for you. Now, it is:
(22(x)(x))/x(x). Then it cancels out to 22. That's it. 22.
Take a random 2-digit number that is more than 10(e.g, 96). Now, subtract the difference between the two digits of the numbers from your original number. Continue until both digits are the same(e.g,9-6=3, 96-3=93, 9-3=6, 93-6=87, 8-7=1, 87-1=86, 8-6=2, 86-2=84, 8-4=4, 84-4=80, 8-0=8, 80-8=72, 7-2=5, 72-5=67, 7-6=1, 67-1=66 please note that I took the longest one). Name that number x(e.g, x=66). Now, take the sum of the 2 digits and call it y(e.g, 6+6=12 so y=12). Take the product of the both digits(means first digit * second digit) and name it z(e.g, 6 * 6 = 36, so z is 36). Now, take
(x-y)/z(e.g, (66 * 12)/36=22)
Your answer should be 22. If not, please tell me in the comments and I will see if you had a calculation error or something.
Now time for me to explain why this works.
You see, in the first instruction, I covered over about you having the two same digits in your number before continuing. As you know, if there are two of the same digits in a two digit number, it is divisible by 11. So, we will call this number 11x. The last digit stands for 1x while the first digit stands for 10x. Next, let us take the sum of the two numbers. Simple. Just 2x. Lastly, let us take the product of the two digits. Also quite simple. Just x(x). Now, let us take:
(x-y)/z
Easy. Just take (11x(2x))/x(x). Looks tough right? Don't worry, I have simplified it for you. Now, it is:
(22(x)(x))/x(x). Then it cancels out to 22. That's it. 22.
Friday, 2 August 2019
3/8/2019
I hope for a good day ahead. Just remember to bring Recorder and... do SC concept MAP!!! I haven't even started!!! Ahhhh!!!
2/8/2019
Please remember to do your RRJ (for those who haven't) and SC concept map. Also, do REMEMBER to bring your recorder next Wednesday.
Intro
Hi! Im a kid called Ernest Tan and I like to play brawl starz!!! I sometimes do silly things but who cares, right???
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