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### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Mon Feb 05, 2018 10:39 pm
5(b)

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Tue Feb 13, 2018 8:37 am
Where is the problem 7?

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Thu Feb 15, 2018 9:39 am
Here you can get the full solution of No,7

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Sun Mar 04, 2018 8:25 am
Problem 3.

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Mon Feb 18, 2019 1:35 pm

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Mon Feb 18, 2019 2:45 pm
samiul_samin wrote:
Sun Mar 04, 2018 8:25 am
Problem 3.
This link is corrupted.Here you can get the solution of problem no 3.

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Mon Feb 18, 2019 2:49 pm
prottoy das wrote:
Mon Feb 18, 2019 1:35 pm
Problem no $6(b)$.

### Re: BdMO National Secondary: Problem Collection(2016)

Posted: Mon Feb 18, 2019 5:14 pm
Problem 1(a)
Hard solution
$(n-1)×n×(n+1)=(n^2-n)(n+1)$[According to fermat's little theorem given expression is divided by $2$ ]

$(n-1)×n×(n+1)=(n^2-n)(n+1)=n^3-n$[According to fermat's little theorem given expression is divided by $3$ ]

So,$(n-1)×n×(n+1)$ is divided by $2×3$ or $6$. Proved.