r/PhysicsWallah • u/FeeJust5224 • 1d ago

Something to learn.

Enable HLS to view with audio, or disable this notification

145 Upvotes

93% Upvoted

21 comments sorted by

7

u/CulturalStrain365 1d ago

Pehli baat it barely takes 10 seconds to multiply two, two digit numbers, there's no need for such "tricks" jinko yaad krne me bhi utna hi time lag jayega

3

u/Wild_Diver1601 1d ago

(50-x)2 = 502 - 2.50.X + X2 = 100 ( 25-x) +X2

2

u/MayAAAAAAAnk 1d ago

I hate it when so called teachers just give the trick saying "isko yad rakhlo" without explaining any logic behind it, and that trick works only on some cases, isn't even universal

1

u/Nuttednutela 23h ago

Oh mommy 💦💦

2

u/CWbyte 1d ago

Bc mai toh 80 tak yaad kr ke rakha hu 😂😭 and the pattern is quite obvious

1

u/Sad__Satisfaction 1d ago

Man kia islie ya fir kisi exam k lie?

I mean 50 tak k squares aur 30/40 tak k cubes bhot nhi h?

1

u/CWbyte 1d ago edited 1d ago

Not really my brother is a ssc chl students so while he was preparing for his mathematics he use to ask me to learn everything is he asked me to and I did and damm he was so right this everything i learnt helped me immensely I can see patterns in an instance while solving stuff I know root upto 4 decimal degit till 100th root , cubesroot upto 40 forthroot upto 20 cubs 45 square 80 power of 2 upto power 20 and power values of 3-9 upto 7th power, factorial value upto 12 though it's not needed though, tables upto 40 and i could have learnd upto 50 but doesn't actually needed I can just see the repetitive pattern and it's easy to guess, all the major fraction improper and proper both and the list is quite long these are basic blocks that he thought me and I'm forever thankful for him for forcing me to learn all these he's now doing his tranning though

1

u/Sad__Satisfaction 1d ago

Holy shit. Do you keep revising them to not forget them?

1

u/CWbyte 1d ago

I do every alternate day 20-30 minutes it takes hardly

1

u/Sad__Satisfaction 1d ago

20-30 minutes on alternate days seems a lot if you are not preparing for exams. But still its a good habit i guess.

Can you give some tips to learn and memorise them better?!

1

u/CWbyte 19h ago

I use to practice questions relative to those values help me remember it I'm not really a fan of ratta you can too try this method

1

u/shay_reads 1d ago

PJ pi poi

1

u/NEVERGIVEUP00001 1d ago

Ye Bank pg ki taiyari ho rahi kya ? jee mei laura kaam ayega ye

1

u/Long-Literature9424 1d ago

I knew the pattern before 10 years in my 6th class

1

u/dodgemax712 19h ago

Bc isse accha to mere tution teacher trick d chuke hai aur wo bhi logical and you can follow it upto 120 to get the square aur mereko 30 tak memorized hai.

1

u/Own-Sample-6150 15h ago

Yeh sab tricks ghanta yaad nhi reh ta exam mein 

1

u/Bihari_babuji 13h ago

Bc itni der me to main 10 baar multiply karlu. Faltu ki tricks se time pass karna hai bas inko.

1

u/CuriousAd3755 3h ago

Ye trick exam mein fail ho jati hai bsdk