Find x, such that : \(x^x\left\{{}\begin{matrix}x+x\\x\times x\end{matrix}\right.\)

In this picture below make by triangles. But in the picture there is an octagon.Can you find the octagon?

Find the 100th number:

2, 23, 234, 34, 4, 45, 456, 56, 6, 67, 678, 78, 8, 89, 890, 90, 0, 01, 012, ...

A triangle ABC has each side has 10cm. Let the point D in the middle of the line AB, E in the middle of the line BC, G in the middle of the line AC as shown. Ask in before fold DG, DE, find the perimeter of the square CDEG?

Find x, know that : \(x^{2}+x=x\times\left(x-1\right)^{x-1}\)

Find the odd one out:

1422, 6234, 6795, 1623

Find the sum of the number of row 5:

2    Row 1

2  4   Row 2

4  6   8   Row 3

6  8  10  12   Row 4

?  ?   ?    ?    ?   Row 5

Find the total from the 10th number to the 20th number in the sequence:

1698, 698, 98, 982, 9820, 820, ...

Find the odd one out:

2350, 1472, 1009, 2017, 1108

Find the 111th number in the sequence:

12, 10, 14, 12, 16, ...

In the sequence, the arrow changes the direction .If the pattern continues, what is the 100th shape?

\(\Leftarrow\Rightarrow\Leftrightarrow\Leftarrow...?\) A)\(\Leftrightarrow\)  B)\(\Leftarrow\)  C)\(\Rightarrow\)

In the sequence below, each line was 8cm. If the pattern continues, find the perimeter of  8th shape?

How many polygon in the picture bellow?

Find the odd one out:

6547,2139,3456,9989,1097,2111,2163

Find the odd one out:

6745, 4639, 1234, 4298, 7908, 3455, 9897, 6765, 8102, 2146

1)Tony choose the smallest 3 - digit prime number, Lina choose the biggest 4 - digit prime number. Find the total of 2 numbers Tony and Lina choose.

2)Anna walks 8762 meters. Becky walks 80² meters. How long Anna walk more  than Becky ?

3)Choose the right answer:

a)The biggest number among 3465, 8977, 1299, 7908 is:

A)1299   B)7908   C)8977   D)3465

b)Sally makes 2109 rings. Tommy makes more than Sally 1138 rings. What is the right calculation to find how many rings Sally and Tommy makes together?

A)(2109+1138)+2109    B)(2109-1138)+2109

C)(2109-1138)+2109     D)(2109-1138)-1138

IF \(x+4567108=\left(-4566109\right)\), FIND THE VALUE OF \(x\times\left(-8\right)\)

The 2-digit square number minus 28 is the number Becky choose. The number Becky choose divide 9 equals 4. If the number Becky choose add 20, can the number Becky choose divisible by 6 ?

The train go from A to B has the length is 500km.  In middle has a bridge. If CB = 264km, AB = CB : 4 (km) , find the length of the bridge CD ?

Anna choose number it is the 2 - digit number. That number is can divisible 18. If the divisor add 10, that number can divisible the new divisor too. What is the number Anna choose?