ba chữ số 9 cạnh nhau

The greatest number 3-digit is 99

The area of the square is:

         38 x 38 = 1444(m2)

                  Answer: 1444 m2

But i also have the answer

           The area of the rectangle is :

                    8 x 9 = 72 ( cm2 )

                              Answer : 72 cm2

I'm the length must be a 9 cm, width is 8 cm

please check

my answer is a)708

Congratulations Lê Quốc Trần Anh

9 bills of 100 euro: 100 x 9 = 900 ( euro )

9 bills of 10 euro: 10 x 9 = 90 ( euro )

10 coins of 1 euro: 10 x 1 = 10 ( euro )

He has: 900 + 90 + 10 = 1000 ( euro )

            Answer: 1000 euro

A group of kangaroos of four colors.
Then the 29th kangaroo is colored:
            29: 4 = 7 (residual 1)
Then the 29th kangaroo is black.

\(\dfrac{5}{89}+\dfrac{8}{59}=\dfrac{295}{5251}+\dfrac{712}{5251}=\dfrac{1007}{5251}\)

The total scores for the four tests are:
                  90 x 4 = 360 (points)
The total score of the first three tests is:
                  82 + 86 + 92 = 260 (points)
Her fourth test was:
                 360 - 260 = 100 (points)
                       Answer: 100 points

i explained

The numbers divide 220 are: 1,2,4,5,10,11,20,22,44,55,110.When we add them up, we have 284.

The numbers divide 284 are: 1,2,4,71,142.When we add them up, we have 220.

no i know more

i just know how it called

right?

amicable numbers

please check for me

these called friendly numbers