Finding the Next Number in the Series | Math Riddle | JusticeTheTutor #math #maths #shorts

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Justice Shepard

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Add 2, add 3, add 4, add 5. It's a sequence. Keep it simple.

FactionalSky

You made that way more complicated than it needed to needed to be lol

zackdrummer

Why make it complicated when it's very simple?

AV-hjcr

Everyone is saying he made it more complicated but the truth is, I wouldn’t know how to figure out what is in between if he did not break it down for me. I didn’t recognize the pattern. I wasn’t taught this kind of math in school. I don’t know why but now that he showed me this I’m able to figure out what is in between and then I could take it to the simple way that everyone’s talking about the first you have to understand, what the hell is going on before you can simplify it so I’m very thankful for this little short. A lot of people think it’s common sense, but if you weren’t taught this, I’ve never seen anything like this you could be stuck there staring at it looking for something of familiar, but not knowing hot to actually get there.

ladyfame

Lets make it 100 times more complicated than its need to be. Great job !!!😅😅😅

Miloshx

wtf. it adds by 2 then 3 then 4 then 5. thats how i got to 15.

stevenschmidt

I never knew how to figure this out. Finally. Thank you!

SimpleMeasures

Don't make it so hard. These tests are timed, you need to get to the correct answer as fast as possible, and keep moving.

jenniferbreidenbach

1, 3, 6, 10...
Inner summation of the sequence:
2, 3, 4...
Arithmetic progression
d=3-2=1, a=2, n=?
Summation, S(n) contains in the original sequence
S(n)=(n/2)(2a+(n-1)d)
S(n)=(n/2)(3+n)
That means the progression, 1, 3, 6, 10... contains S(n) with n starting at 0
=> T(n)=1+[n(3+n)/2], n=0, 1, 2, 3...
=> T(4)=1+[4(7)/2]
= 15

To make it align with the actual progression terms
Since 1 starts with nothing as itself without addition of anything, with it also being the 1st term. Since the summation above is based on the arithmetic progression _in between_ the term which are not aligned with the original progression, then:
S(n) = [(n-1)/2](2+n)]
.: T(n) = 1+S(n)
T(5) = 15

NoovGuyMC

A more reasonable approch to this is:
1+2=3, 1+2+3=6, 1+3+6=10, 1+4+10=15, i always remind people to find simple patterns that could solve the equation very fast, and it just takes basic counting even if it doesn't match this, you have to use different patterns to satistfy the equation, in other words don't memorize formula, but understand the fundamentals.

Idunno-fsol

I did 3-1 wich is 2
6-3, wich is 3
And then 10-6 wich is 4
So the next logical nuber whould be 5,
10+5 is 15
I got the right answer but in a different way

lebeg_beats

It called triangles numbers and are made by adding every natural number ex: 3 = 2+1
6 = 3+2+1
So 15 is 1+2+3+4+5

morveman_yt

wow, what a convoluted way to come up with the answer.

illmade

It can be much simpler. It set adds 2, second set adds 3, third set adds 4, so fifth set adds 5. Kids should be able to do this in their head; it’s critical thinking, not making it more complicated.

shelleysavoy-whwl