Search found 138 matches
A four headed monster :evil: :evil: :evil: :evil: has 63 children . He wants to give each child a name of three English letters . And every 63 names will be different . In a name of a child , a letter can be used more than once . What is the minimum number of letters does the monster need to use ?
- Sat Feb 08, 2014 10:35 am
- Forum: National Math Olympiad (BdMO)
- Topic: BdMO National 2013: Primary 8, Junior 5
- Replies: 1
- Views: 2146
Given there are 13 boys . Every boy have 3 girls as their friends . And every girl have 3 boys as their friends . Therefore , making one girl as the friend of 3 boys , the total number of girls , as friend of boys are 13*3 or . Taking one girl for three times .So the number of girls is 13 also .
Raiyan replied , Here , 4 = 4 . Now , about this situation , 3 might be equal to 5 in many ways . In a place , I heard someone about asking this question . He said 3 = 5 because , 3(three) have five letters . In this case , 4(four) has four letters . So, 4=4 . Anyone , If my answer is correct pls le...
In the attachment figure below , the rectangle ABCD , along the line BE the triangle ABE is folded and the point A falls on CD at A' . BA' = 10 , BC =6 , DE = a/b and a , b are co-prime , a+b = ? and what is the value of a and b ?
- Mon Feb 03, 2014 10:32 pm
- Forum: Secondary Level
- Topic: I have a confusion in a problem of series .
- Replies: 4
- Views: 2218
In this series , a group of (1,2,3,.............400) is made . In it , some numbers are to be removed such that , a new series is made and in that series , the sum of any two numbers won't be divisible by 7 . What is the maximum number of numbers in that series .