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I am posting here a practice problem set for Secondary level students. Happy practising

I am posting here a practice problem set for junior level students. Happy practicing

Don't know about Math Foundation. But, this time there is no stall named "গনিতের বই"

When $k$ divides $a$ and $a+1$ then, $k$ divides $a+1-a=1$
so, $k=1$

here, $x^7-1=f(x)\cdot(x-1)$ so, \[f(x)|(x^{42}-1),(x^{35}-1),(x^{28}-1),(x^{21}-1),(x^{14}-1),(x^7-1)\] so, the remainder will be \[7\] How does the green line lead to the red line? :? :? :?: :?: actually, what I didn't think much important to mention was this \[f(x)|x^{7}-1|x^{7n}-1\] It should b...

Shadmanmajid wrote:Problem no.3- For a positive integer n, find the number of solutions of the congruence x
2 ≡ 1 (mod n).

where is the $x$ ??

Li is a chinese unit
but, what is "in 2 Li" ?

When visiting a rectangular plantation, the foreman told you that they recently put up 28 Li of fencing around the entire plantation. Having spent hours walking the width of the plantation, you know that it is 3 Li long. What is the area ( in 2 Li ) of the plantation? I believe it is copied from an...

Fahim Shahriar wrote: It's $7$. For $n$ distinguishable fair coins, $(n+1)$ outcomes.

yes. You are right. So, is mahi.
now, someone edit that 'in'.

As they are indistinguishable, it should be $6.$