Search found 57 matches
- Wed Jan 25, 2017 7:19 pm
- Forum: Junior Level
- Topic: COMBINATORICS!!!
- Replies: 4
- Views: 3855
Re: COMBINATORICS!!!
Well,those were typing mistakes.Avoid those
- Mon Jan 23, 2017 7:45 am
- Forum: Junior Level
- Topic: COMBINATORICS!!!
- Replies: 4
- Views: 3855
COMBINATORICS!!!
Observe the following cases:1222111,3334447,6669222;in each of the cases, the used digits appear at least thrice.Find the number of such 7 digit numbers with this aforementioned property....
- Sun Jan 22, 2017 11:59 pm
- Forum: Junior Level
- Topic: crazy geometry
- Replies: 1
- Views: 2492
Re: crazy geometry
There are some errors in your proposed problem
- Sun Jan 22, 2017 9:06 pm
- Forum: Primary Level
- Topic: Primary level maths problem, please help
- Replies: 15
- Views: 19625
Re: Primary level maths problem, please help
Well,this simply reduces the problem to the sum of n consecutive positive integers,which follows the equation :n(n+1)=156,simply factoring the expression,we find n=12 and n cannot be -13 as it is a negative integer.This just solves our problem that at the 12th stop,the bus would be full...
- Thu Jan 19, 2017 7:23 pm
- Forum: Junior Level
- Topic: Find $$<x+<y$$
- Replies: 4
- Views: 4339
Re: Find $$<x+<y$$
X+Y=150˚,as because by extending some lines in the figure,at a point;we find Y+30˚ as the supplementary angle of X ;so,X+Y+30=180˚,X+Y=150˚
- Thu Jan 19, 2017 2:33 pm
- Forum: Junior Level
- Topic: Kushtia '15 \9
- Replies: 2
- Views: 2888
Re: Kushtia '15 \9
We may also find AB*CD by finding their respective values.In that case,we draw a perpendicular from B to CD which divides CD into DQ+QC.Then we may notice that by joining A with C,we get a right angled triangle DAC.AD=8 units.Again by connecting D with B,we get a right angled triangle DAB.But if we ...
- Wed Jan 18, 2017 9:55 pm
- Forum: Junior Level
- Topic: BDMO 2016 6No
- Replies: 6
- Views: 4787
Re: BDMO 2016 6No
We may consider a 6 digit number abcdef and place each of the numbers in the respective positions.In that case,we may find that the number of 6 digit numbers are 2*3*3*3*3*3 as we cannot place 0 in the position a.So there are 486 cards,we can make