Có thể lập được 6 số là: 1350, 1530, 3150, 3510, 5130, 5310

Có thể lập được 6 số là: 1350, 1530, 3150, 3510, 5130, 5310

hok tốt

bạn tham khảo nhé !

In fact, American currency is made from cotton fibers, not wood. Both are cellulose, of course, but the special cotton-based paper used by the US Mint is much more durable.

Money used to grow on trees, but unfortunately for me, my money tree died a couple of winters ago. Very difficult to locate a nursery which carries replacements.

Anyway, these days money much more commonly comes out of walls. Usually there is a built-in TV screen, which is incapable of showing any actually entertaining images. But if you are polite to it, and treat it properly, it can spit out considerable quantities of money.

Some people have evidently not learned how to behave around these walls. When they try, no money comes out. They usually leave, uttering some very offensive words.

Bạn tham khảo nhé!

The phrase "Money doesn't grow on trees" highlights the reality that obtaining money requires effort, time, and resources. Firstly, earning money usually demands hard work, whether through employment, running a business, or providing services. Unlike picking fruit from a tree, financial success involves dedication, skill development, and perseverance. Secondly, money is a limited resource that must be managed wisely. Unlike the natural regeneration of fruit, once money is spent, it requires further effort to replenish. Lastly, financial stability often necessitates strategic planning and investment. Growing wealth typically involves making informed decisions, such as saving, investing, and budgeting, which are far more complex than simply harvesting produce. These factors underscore that money requires conscious effort and thoughtful management, rather than being an easily accessible resource.

*Mong bạn học tốt

Giúp mình với ạ cầu xin mọi người luôn đó 

\(65180=60000+5000+100+80=6.10^4+5.10^3+1.10^2+8.10^1\)

\(101010=100000+1000+10=1.10^5+1.10^3+1.10^1\)

\(\overline{ab0cd}=\overline{a0000}+\overline{b000}+\overline{c0}+d=a.10^4+b.10^3+c.10^1+d.10^0\)

\(AN=\dfrac{1}{2}AC\)

=>\(S_{AMN}=\dfrac{1}{2}\cdot S_{AMC}\)

=>\(S_{AMC}=2\cdot36=72\left(cm^2\right)\)

Vì AM=1,5MB

nên \(\dfrac{AM}{MB}=\dfrac{3}{5}\)

=>\(\dfrac{S_{AMC}}{S_{ABC}}=\dfrac{3}{5}\)

=>\(S_{ABC}=\dfrac{5}{3}\cdot72=120\left(cm^2\right)\)

Ta có: \(S_{AMN}+S_{BMNC}=S_{ABC}\)

=>\(S_{BMNC}+36=120\)

=>\(S_{BMNC}=84\left(cm^2\right)\)

a. Gọi số chính phương là \(n^2\Rightarrow25< n^2< 225\)

\(\Rightarrow5^2< n^2< 15^2\)

\(\Rightarrow5< n< 15\) mà n chẵn \(\Rightarrow n\in\left\{6,8,10,12,14\right\}\)

\(\Rightarrow\) Có 5 số chính phương thỏa mãn

b.

Có 2 số thỏa mãn là: \(1=1^3\) ; \(27=3^3\)

GGhj

\(8⋮3n+1\)

=>\(3n+1\in\left\{1;2;4;8\right\}\)

=>\(3n\in\left\{0;1;3;7\right\}\)

=>\(n\in\left\{0;\dfrac{1}{3};1;\dfrac{7}{3}\right\}\)

mà n là số tự nhiên

nên \(n\in\left\{0;1\right\}\)

FFbh