## শেষ ৩টি অঙ্ক কত?

For students of class 6-8 (age 12 to 14)
math_hunter
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Joined: Mon Sep 24, 2018 10:33 pm
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### শেষ ৩টি অঙ্ক কত?

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

samiul_samin
Posts: 1007
Joined: Sat Dec 09, 2017 1:32 pm

### Re: শেষ ৩টি অঙ্ক কত?

math_hunter wrote:
Wed Mar 06, 2019 12:18 pm
1x2x3x4x5x.....x2018 এর শেষ তিনটি অঙ্ক কত? (একক, দশক, শতক)
\$\fbox {000}\$

The product is divisible by \$1000\$.So,the last three digits of the product must be \$000\$.

math_hunter
Posts: 22
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### Re: শেষ ৩টি অঙ্ক কত?

How can I say that the product is divisible by 1000?

samiul_samin
Posts: 1007
Joined: Sat Dec 09, 2017 1:32 pm

### Re: শেষ ৩টি অঙ্ক কত?

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\$.

math_hunter
Posts: 22
Joined: Mon Sep 24, 2018 10:33 pm
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### 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

samiul_samin
Posts: 1007
Joined: Sat Dec 09, 2017 1:32 pm

### Re: শেষ ৩টি অঙ্ক কত?

No need to mension.

Samya
Posts: 2
Joined: Thu Dec 03, 2020 8:50 pm

### Re: শেষ ৩টি অঙ্ক কত?

Here 1000 is a factor of the product then it is obviously dived the product

Raonak_Tasnim
Posts: 2
Joined: Fri Dec 11, 2020 11:07 am

### Re: শেষ ৩টি অঙ্ক কত?

1*2*3*4*5*6*7*......*1000*.....*2018
Ans will be 000

HOSSAIN MANSUR
Posts: 1
Joined: Wed Feb 24, 2021 1:16 pm