7.There are 8 lines mutually parallel and 10 horizontal lines. Find the number
of parallelograms made by the intersections of these lines.
Didn't understand the English...
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Nadim ul Abrar: 1. Yeah I did it this way too... First I proved that it is not possible for numbers having more than 3 or 3 digits... Then $10a+b=7a+7b$ 2. I didn't understand the question's English version... The bangla translation is- "ধর ৭ জন মানুষ আছে। একটা টিমে কমপক্ষে একজন থাকতে হবে। প্টিমে এক...
- Tue Dec 27, 2011 11:11 pm
- Forum: Number Theory
- Topic: Preparation Marathon
- Replies: 112
- Views: 27778
মাসুম ভাই বলল সময় শেষ। (In Facebook Chat) He is kinda busy. So he will post the next questions tomorrow... And I withdraw my comment on 9 being simple... The appropriate word should be "simpler" :? So we can start discussing the problems... How did you guys solve 2 using multinomial theorem? :?: