Bounds
Putes Rebiv Lyrics

@global_overmatters

You are the best, honestly. I’m so glad I stumbled upon your videos, thank you sm for the free revision resources❤

@1stClassMaths

Glad you find them useful and took the time to comment. You are also the best, keep working hard.

@Beesouppie

ur pfp is cool

@TewoderosSolomon

Wow

@materialgirly

This was so helpful! I used to always struggle with bounds but now understand it thanks to this!

@1stClassMaths

You're so welcome!

@stephenoldfield7124

@@1stClassMaths WHY ARE YOU MULTIPLYING BY 25 FOR THE MAXIMUM WHEN THE SIDE HAS TO BE LESS THAN 25? wOULDN'T THE MAXIMUM LENGTH BE 24.9?

@yana7066

I cant believe im in y11 it doesnt feel real…

@prplmo0n539

That’s gon be me next year unfortunately

@AfsarahRashid

I love this video. It'll help me a lot in my exams

@lviesflr

cramming for a mock tmrwww

@Kingofcursesedit

Watching this during exam

@kikiboo-4839

Watching this 10 mins before the exam I am cooked😭😭

@crystalslife3001

Update?

@prplmo0n539

Update??

@Omar_Hanii

@prplmo0n539update?

@Halal-Edit

Update?

@NotFishyy

He was in fact cooked

@ammarahsurve1444

Thank uu! I was so confused with this and know i understand

@legit_fade

Thank you these videos really help me out and have top tier explanation.

@belugacat4599

You’re the best mate💯💯 thank you for such useful video👍

@C.H.I.P.S

Watching this before 1hr of my exam 😔

@prplmo0n539

Update?

@hayamedriss1595

same

@Miiiyyyuuu

TYSM I UNDERSTOOD IT SO FAST I HAVE MY EXAM😭✨

@prplmo0n539

How’d it go??

@humanbeing113

THANK YOU
i cannot thank you you enough bro

@guyswithauraa

tysm bro you helped me a lot

@The_Pale_King_of_Carnage

thanks for explaining this mate ya helped me a ton

@1stClassMaths

No problem 👍

@aminahali-li9kf

ate this up

@TheMathLab800

I was confused about the maximum area, because your are unable to use 25cm since that inequality doesn't have a line through it?

@coolestcrow

7 months late, lol, but here's why:
It's the upper BOUND, like the "It cannot go higher than this" value
You could technically use 24.9999999999 but then you could go for infinite decimal places.
So it's just more convenient to use 25.

@cvbxyaphet802

on the question where theres a root it satisfies the rule for dividing upper bounds but the v-n dose not satisfy the rule of subtracting upper bounds it actually became subtracting lower bounds.im confused or do we have to prioritize the rules in order or something?

@romxsayeppie

best teacher out there

@1stClassMaths

Too kind!

@samuellacobbinah

The practice questions on your website why is it that with money bounds u use lets say 8.49 instead of 8.5 and 1.64 instead of 1.65 for maximum total amount of money?

@1stClassMaths

Hi. With money we cannot actually have an amount of money that falls between £8.49 and £8.50 so in this question the maximum would be £8.49 exactly. I realised that I hadn't explain this sort of thing well in the video and I may also revise some of the questions on it too. For example in Q3 in reality the maximum number of fans is 32499 because they are always integer values.

Basically I didn't do a good enough job on this one!

@samuellacobbinah

The question was £8 and was 7.50<_ £ <8.50 but in the answer 8.49 was used instead. But thank u for the video!

@1stClassMaths

Hi yes I know the one you mean. It’s just because money cannot take a value between 8.49 and 8.50 like 8.495 etc isn’t an actual value of money.

@samuellacobbinah

@1stClassMaths  Ohkay that makes sense. Thank you very much for the explanation.

@starringpeiole

maths test tomorrow chapter 9 + 10 GANG WE CAN DO THIS

@mariahussain7360

Your videos are so helpful. I have a question, why did you multiply 25 with 8.5 for the maximum possibility whereas we know that length's upper bound is less than 24 and widths upper bound is less than 8.5? Please help!

@1stClassMaths

The upper bound is 8.5.

An upper bound necessarily a number we can achieve it is just the boundary. We can have any number up to 8.5 so we consider 8.5 the upper bound.

@evgenyzak2035

Note which symbols are used. In lower <=, in upper <.

@maryamsiraj1981

What grade r u guys in (I'm in 9th)

@hphai1-e8p

same

@Pr_xity

Mate, I'm in Uni this comes in ALOT

@AfsarahRashid

11th grade

@prplmo0n539

Year ten student here

@DY-nt4lm

Yr 8

@BRUVParty

How can the maximum width be 8.5 if 8.5 rounds up, i thought it would be 8.4? 2:16

Nvm 😂 because u put anything less than after, my bad

@DijaKamsi

At 13:41 how did u get the upper and lower bound for 0.21

@DY-nt4lm

It Is 0.005 I think bc 2 decimal place of 0.21 is 0.05, and 0.05/2 = 0.005, so it will be pls or minus 0.005

@ali.6409

Why r there missing topics on the checklist for edexcel higher on your website like pythagoras

@1stClassMaths

I haven’t made videos on all of the topics yet?

@j0sh.f2

pls try make all videos@@1stClassMaths

@1stClassMaths

@@j0sh.f2 Am trying as fast as I can. Each video and booklet with it takes probably 8-10 hours for reference!

@j0sh.f2

@@1stClassMaths okay thanks, keep up the content!

@maryamsiraj1981

How is it 25000? 3:26

@ajmrf

the lower bound isnt 25000 it was just states because its mentioned 26000 was rounded to sifnificant figures

@samuelloduro291

Wow the lesson was good

@cvbxyaphet802

or is it related to bodmas

@RejowanaKarim

about the last one.. what if even the first digit doesnt agree?

@1stClassMaths

Good question. In exam questions they will make them such that they do agree for you.

@Sallykhalid-bi3qz

I keep forgeting lessons send help

@urfav_vxnilla

SAME.

@IHeartHumbug

is this for calc or non ??

@ShsbakBfbajan

Calc

@muhammadaffan2350

@ambayezewdie3875

Watching this before presentation 😅😢

@kangxeditz

Watching this on the way 😂

@vixzy2837

1st class math> math genie

@afeef1290

same here

@abdulrehman3295

Tomorrow is my exam😢

@Fader-kf1is

Hey @ 1st class math- can u please make a video of rules, about nearest decimal place nearest sf and how to find the upper bound nearest with them

@MishriPatel-uz7es

Just out of curiosity because im not understanding for example 5 Lower Bound when i punched it into my calculator i got 73.35657371 im not sure if my calculators wrong or smth but can someone just clarify

@1stClassMaths

Very difficult to say. I have tried to see what you may have typed in but I cannot get that answer. Can you tell me exactly what buttons you press and in what order and I will see if I can help. What model is your calculator?