Search found 22 matches

by math_hunter
Sun Mar 10, 2019 6:23 pm
Forum: Junior Level
Topic: BDMO 2016 Regional
Replies: 17
Views: 92014

BDMO 2016 Regional

How to solve this problem?
by math_hunter
Sun Mar 10, 2019 11:44 am
Forum: Junior Level
Topic: BDMO 2019 : National : Junior : Pblm 05
Replies: 8
Views: 10358

Re: BDMO 2019 : National : Junior : Pblm 05

Where can I get a clear description about "PIE" and how to solve this problem using "PIE"?
by math_hunter
Sat Mar 09, 2019 7:21 pm
Forum: Junior Level
Topic: BDMO 2019 : National : Junior : Pblm 05
Replies: 8
Views: 10358

Re: BDMO 2019 : National : Junior : Pblm 05

Take squares and cubes, Remove the $6^{th}$ powers, Giving us $54$ numbers to remove.Last removed number is $2025$ Thus we get our $2019^{th}$ number$=2019+54=2073$. PIE=Inclusion Exclusion Principle Try for smaller cases(70 or 100) to understand the solution clearly. How do I identify that the las...
by math_hunter
Fri Mar 08, 2019 12:22 am
Forum: Junior Level
Topic: BDMO 2019 : National : Junior : Pblm 05
Replies: 8
Views: 10358

Re: BDMO 2019 : National : Junior : Pblm 05

samiul_samin wrote:
Thu Mar 07, 2019 8:15 pm
BdMO National Junior 2019 P5
math_hunter wrote:
Thu Mar 07, 2019 11:52 am
$2,3,5,6,7,10,11,12,13,...$ is the sequence of integers without all square and cube numbers. What is the $2019^{th}$ number?
By Using $PIE$
Answer:$2073$
Please give the full solution. How it is possible using PIE?
by math_hunter
Thu Mar 07, 2019 11:52 am
Forum: Junior Level
Topic: BDMO 2019 : National : Junior : Pblm 05
Replies: 8
Views: 10358

BDMO 2019 : National : Junior : Pblm 05

2,3,5,6,7,10,11,12,13,... is the sequence of integers without all square and cube numbers. What is the 2019th number?
by math_hunter
Thu Mar 07, 2019 11:45 am
Forum: Junior Level
Topic: Area of a hexagon
Replies: 2
Views: 7790

Re: Area of a hexagon

samiul_samin wrote:
Thu Mar 07, 2019 12:22 am
You can get a solution here.
Thanks
by math_hunter
Wed Mar 06, 2019 9:41 pm
Forum: Junior Level
Topic: Area of a hexagon
Replies: 2
Views: 7790

Area of a hexagon

What's the solution of this problem???
by math_hunter
Wed Mar 06, 2019 9:36 pm
Forum: Junior Level
Topic: শেষ ৩টি অঙ্ক কত?
Replies: 5
Views: 8881

Re: শেষ ৩টি অঙ্ক কত?

samiul_samin wrote:
Wed Mar 06, 2019 9:12 pm
math_hunter wrote:
Wed Mar 06, 2019 6:41 pm
How can I say that the product is divisible by 1000?
The product=$1×2×3×...×1000×...×2018$
So,it must be divided by $1000$.

As example $1×2×3×4×5$ is divided by $1,2,3,4,5$.
Hmm...Thanks
by math_hunter
Wed Mar 06, 2019 6:41 pm
Forum: Junior Level
Topic: শেষ ৩টি অঙ্ক কত?
Replies: 5
Views: 8881

Re: শেষ ৩টি অঙ্ক কত?

How can I say that the product is divisible by 1000?
by math_hunter
Wed Mar 06, 2019 12:18 pm
Forum: Junior Level
Topic: শেষ ৩টি অঙ্ক কত?
Replies: 5
Views: 8881

শেষ ৩টি অঙ্ক কত?

1x2x3x4x5x.....x2018 এর শেষ তিনটি অঙ্ক কত? (একক, দশক, শতক) :?: :?: :?: