Chomok Hassan - গণিতের রঙ্গে series

[Purbasha T]

This guy makes mathematics interesting
..a phenomena I've been away from in recent times thanks to some pure (!) abstract modules in my uni.

Here's the first of his videos, he has seven others so far.

পর্ব ১-আল মুকাবালা

[Zeeshan]

wth.....no

[Purbasha T]

Orginally Posted by Zeeshan
wth.....no

LOL! He starts off quite simply...but then ups the ante.

From the 4th video, he starts to give out fun questions to solve out, the solutions of which he gives out later.

Not PhD materials (much to your dissatisfaction ), but interesting and entertaining nonetheless.

[iDumb]

he has been discussed in youtube videos thread before..... he is funny and good in explaining few simple concepts here and there, but they are hardly useful. At least that's what I think. I don't think his videos are gonna help you pass math class.

[Nasif]

Not sure it was meant to be funny or serious. His approach seems to resemble standup comedians. Has similar delivery style of Hanif shonket.

And please stop scratching the nose every five seconds. Clean the nose before the gig.

[Purbasha T]

Originally Posted by iDumb
...I don't think his videos are gonna help you pass math class.

They won't?! but I've thrown away all my notes after watching these videos thinking they would!!!

Nehiiiiiiiiiiiiiiiii

[Purbasha T]

Originally Posted by Nasif
Not sure it was meant to be funny or serious. His approach seems to resemble standup comedians. Has similar delivery style of Hanif shonket.

And please stop scratching the nose every five seconds. Clean the nose before the gig.

Hahaa..

Entertainment is the call of the day, if education/knowledge filters though as well that's a bonus!

[Purbasha T]

The latest puzzle:

Ten packets of gold coins, each containing 10 coins.

Out of the ten, nine contain coins weighing 10 grams each, with the other containing coins weighing 9 grams each.

Using a digital balance ONLY ONCE, how can you figure out which packet contains the coins weighing 9 grams each?

Bring on the BC brains.

[Navo]

I don't think the point about the videos is to be 'useful' per se, but is rather to imbibe a love for learning maths into the regular school-going viewer. Given the general state of BD's education system, which is so reliant on memorization, he is to be commended for that!

[Zeeshan]

as if we mathematicians never had problems with geekiness, gaucherie and plain awkwardness...

[Zeeshan]

Not sure what orphy found so amusing about him. I always seen how he gets a little too "utsahito" seeing mediocre BD celebrities...

RAise the bar yo. I mean you also loved Khan Academy guy... Problem with these ideas are that they are not well planned...cheap...cliche...it's all about swag....as Zunaid once said. it's 20 frikking first century ffs...

[Purbasha T]

^ lol! There has to be a bar in the first place for it to reach the heights.

And about these ideas being cheap and cliched: so your analysis of them isn't?

[Ajfar]

For a second I thought Zeeshan bhai's made up chokmok sen character came to life

[Antora]

Originally Posted by Ajfar
For a second I thought Zeeshan bhai's made up chokmok sen character came to life

well, at least I'm not the only one who thought this :P

[tonoy]

Originally Posted by Purbasha T
The latest puzzle:

Ten packets of gold coins, each containing 10 coins.

Out of the ten, nine contain coins weighing 10 grams each, with the other containing coins weighing 9 grams each.

Using a digital balance ONLY ONCE, how can you figure out which packet contains the coins weighing 9 grams each?

Bring on the BC brains.

Are we allowed to open the bags? If so, then one can easily solve it. Take 1 coin from bag 1 and label it 1, 2 coin from bag 2 and label it 2 and continue this till bag 10.
(if you can't label it, then you can may be stack it in a special way)

so you have:
10+9+8+7+6+5+4+3+2+1 = 55 coins.

If they were all 10g each, they would've weighed 550g. But since, it will be less, you can figure out which bag will have the 9 g by subtracting the net weight from 550.

ex. if the weight came to 540g. Then you would know it's bag 10 as you took 10 from it and there were a total 10g less.

[Purbasha T]

Too easy aye?!

Here's another one (from the fourth video):

A guy going door to door with census questionnaires arrives at a house where a woman opens the door. At one stage of filling out the questionnaire, the guy asks her about the ages of her three daughters. Woman replies, ''The product of their ages is 36.''
The guy, dumbfounded, asks for another hint. Woman says, ''Even if I tell you the sum of their ages, you won't be able to figure out the correct ages.''
The guy, puzzled, insists for another. Woman replies, ''My eldest daughter likes pet dogs''

After the last one, the guy actually manages to calculate the right ages.

What are they?

[tonoy]

The eldest daughter is 9 and the other are two and two. The second clue kind of gave it away.

[Purbasha T]

Lol, let's wait for more.. or you can put forward some!

[Zeeshan]

tony killing it like scarface

[tonoy]

OK I have an infinite table. As you can see the numbers are all arranged by a sequence. Determine the number in the 1000th row and 900th column. Can you also come up with a formula for Rth row and Cth column?

4 ---7--10--13 ...
7---12--17--22 ...
10-17--24--31 ...
13-22--31--40 ...
. . . .
. . . .
. . . .

[Purbasha T]

Lol looked too easy at the first glance, but had to break a sweat or two.

(r,c)th entry = r+2rc+c

(1000,900)th entry = 1000 + 2x1000x900 + 900 = 1900 + 1800000 = 1801900

Yes?

[tonoy]

Heheh, nicely done.

[tonoy]

Alright, here's another one. Little trivial, but you'll enjoy it.

solve for x:

2^(x+2) + 5^(6-x) = 10^(x^2)

[tonoy]

Sorry, I made a mistake with the question.

Let me make it a bit easier.

2^(x+2) 5^(6-x) = 10^(x^2)

[Zeeshan]

Originally Posted by tonoy
Sorry, I made a mistake with the question.

Let me make it a bit easier.

2^(x+2) 5^(6-x) = 10^(x^2)

http://www.wolframalpha.com/input/?i=+2^%28x%2B2%29+5^%286-x%29+%3D+10^%28x^2%29

?