true I was too weak in geometry specially in the aspect of PRMO question, ctpcm has really increased my thought process and ideas after solving all excercise in it
Hello can you tell me what should I buy This book or ctpcm Or both Note that I am a beginner to prmo and I will start preparation by these books but which book is for basics?J am in 9th class please reply :/
😂 Bahut acchi kitaab hai. Main roz ke do sawaal leti hoon aur class ke wakt jab bore ho to inhe solve karne ki koshish karti hoon. 2,3 din baad ans aa hi jaata hai😂
(x+y)(x-y) = 31 So either: 1) x+y = 31 and x-y = 1 which imply 2y = 30 (y=15) and x = 16 2) x+y = 1 and x-y = 31 which imply -2y = 30 (y=-15) and x = 16 I thought there might be more but, if both x and y are integers, then x+y and x-y must also be integers. As you say, they are therefore equal to 1 and 31. Or are they?? Why should they not equal -1 and -31 instead? 3) x+y = -31 and x-y = -1 which imply 2y = -30 (y=-15) and x = -16 4) x+y = -1 and x-y = -31 which imply -2y = -30 (y=15) and x = -16 Success?
i have used ctpcm it really increased my geometry skill everychild prep for olympiad should do that
true I was too weak in geometry specially in the aspect of PRMO question, ctpcm has really increased my thought process and ideas after solving all excercise in it
Hello can you tell me what should I buy
This book or ctpcm
Or both
Note that I am a beginner to prmo and I will start preparation by these books but which book is for basics?J am in 9th class please reply :/
Mathematical circles is a better option for building thought process@@lalaommprakashray8499
मुझे यह किताब इतनी पसंद आई कि मैंने इसे अपने स्कूल की लाइब्रेरी से चुरा लिया।
😂 Bahut acchi kitaab hai. Main roz ke do sawaal leti hoon aur class ke wakt jab bore ho to inhe solve karne ki koshish karti hoon. 2,3 din baad ans aa hi jaata hai😂
Bhai chori to mat kar 💀
Is the key to the book available?
Sir, do you give online coaching of Russian mathematics ?
You say its for 5th grade students?
What's the pre-requisite?
This is not for 5th graders
3:40 x=16 & y=15
Thank you
Book link to buy through online
It was written at early 90's
(x+y)(x-y) = 31
So either:
1) x+y = 31 and x-y = 1 which imply 2y = 30 (y=15) and x = 16
2) x+y = 1 and x-y = 31 which imply -2y = 30 (y=-15) and x = 16
I thought there might be more but, if both x and y are integers, then x+y and x-y must also be integers. As you say, they are therefore equal to 1 and 31. Or are they?? Why should they not equal -1 and -31 instead?
3) x+y = -31 and x-y = -1 which imply 2y = -30 (y=-15) and x = -16
4) x+y = -1 and x-y = -31 which imply -2y = -30 (y=15) and x = -16
Success?
X=16andy=15
Right. There are other solutions
@@Cheenta -15, -16
X=16,y=-+15
Arthur Engel
That is for inmo
Plese tell in hindi