Dhaka Higher Secondary 2010/12

[BdMO]

If $ \dfrac{x+2}{8}$ is an integer greater than $2$, find the remainder when $x$ is divided by $8$.

[leonardo shawon]

here x > 14
and the remainder is 1.
(vagsesh) is 2,3,4,5. . . . . . . .

[leonardo shawon]

{x+2}/8 > 8 so x > 14
x is divided by 8.
That means 16,24,32 . . . . . .
For x=16 the answer is 2 and remaminder 1
for x=24 answer 3 remainder 1
for x=32 answer 4 remainder 1
...... So, the remainder is 1

[leonardo shawon]

i dont think its quite a good proof... Im working on it.

[Moon]

Please don't post more than once at the same time. You can always edit your post within 1 day.
BTW How did you find that the remainder is $1$ . I think we have $x=8k-2$. So the remainder is?

[leonardo shawon]

okay i wont. I didnt find the edit option first.
Anyway... As BdMo said
x+2/8 > 2 from their i found that x > 14. And x will always be divided by 8. So, i checked for the multiple of 8 greater then 14. BTW, delete my unusal post if u r so kind.
Is there any problem bhaia?

[Zzzz]

And x will always be divided by 8.

I think, you meant 'x will be always divisible by 8'

But, why

[Tahmid Hasan]

$$x+2 \equiv 0(mod 8)$$
or,$$x \equiv -2(mod8)$$
so,$$x \equiv 6(mod8)$$
so why make all that confusion?
actually the greater than 2 thingy was to draw everyone's attention into some inequality.