Search found 138 matches

by Raiyan Jamil
Sat Feb 08, 2014 12:26 pm
Forum: Junior Level
Topic: Monster problem
Replies: 2
Views: 1726

Monster problem

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 ?
by Raiyan Jamil
Sat Feb 08, 2014 12:14 pm
Forum: Primary Level
Topic: Easy sum
Replies: 2
Views: 3260

Easy sum

The product of two numbers is 1000 . If non of the numbers have a zero as their digits , what is their sum ?
by Raiyan Jamil
Sat Feb 08, 2014 10:35 am
Forum: National Math Olympiad (BdMO)
Topic: BdMO National 2013: Primary 8, Junior 5
Replies: 1
Views: 2146

Re: BdMO National 2013: Primary 8, Junior 5

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 .
by Raiyan Jamil
Fri Feb 07, 2014 11:10 pm
Forum: Secondary Level
Topic: Fraction
Replies: 2
Views: 1632

Re: Fraction

Third year students = 40%
Non third year students = 60%
Non second year students = 70%
Second year students = 30%
Fraction = 60/30 = 2
by Raiyan Jamil
Fri Feb 07, 2014 10:35 pm
Forum: Primary Level
Topic: number theory
Replies: 4
Views: 4077

Re: number theory

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...
by Raiyan Jamil
Fri Feb 07, 2014 9:48 pm
Forum: Junior Level
Topic: Confusing geometry
Replies: 4
Views: 2485

Confusing geometry

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 ?


AB.docx
Confusing figure
(10.42 KiB) Downloaded 321 times
by Raiyan Jamil
Fri Feb 07, 2014 9:15 pm
Forum: Junior Level
Topic: Confusing easy math
Replies: 1
Views: 1740

Confusing easy math

In a isosceles triangle ABC , AB = AC . D is a point on AB such that , AD = DC = BC . Then what is the value of angle A ?
by Raiyan Jamil
Mon Feb 03, 2014 10:32 pm
Forum: Secondary Level
Topic: I have a confusion in a problem of series .
Replies: 4
Views: 2218

I have a confusion in a problem of series .

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 .