Find the three out

2012 ; 1985 ; 1857 ; 9997

 Answer: It's number 1985 ; 1857 ; 9997

Find xy

11x . 11y = 165

Answer: 11x . 11y = 165

               11 . xy    = 165

                     xy     = 165 : 11

                     xy     = 15

Find the two out:

A. Book

B. Televison

C. Sofa

D. ruler

E. Textbook

Answer: The answer is Televison and Sofa

Find xy

5x . 5y = 3500

Answer: 5x . 5y = 3500

         xy . (5 + 5) = 3500

         xy . 10        = 3500

              xy         = 3500 : 10

             xy           = 350

Good luck!!!!

Find the one out

A. Televison

B . Book

C. Sofa

D. Armchair

Answer: The answer is B. Book

How many people must be in a group to guarantee that at least 3 of them share the same first initial and last initial?

 Answer: I think it's 30 people ( i'm not sure )

Find the odd one out:

1451 ; 1458 ; 6582 ; 9542 ; 9688

Answer: It's 1451 

Find the odd one out:

 1444 ;  2544 ; 8504 ; 9504

Answer: Nothing ( because there are a even numbers)

No , that answer is wrong

Find the odd one out:

 A. music 

B. physic

C. Maths

D. Kitchen

 Answer: It's D. Kitchen

So easy!!!

Find the odd one out:

1472 ; 2480 ; 1209 ; 2107 ; 1908 

 Answer: It's 1472

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

1408 ; 1457 ; 2045 ; 9995 ; 10457 ; 4562

Answer: The total from the 10th number to the 20th number in the sequence is 4562

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

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

Answer: The total from the 10th number to the 20 th number in the sequence is 1698

Oh sorry

it 1108 ; 1472 and 2350

\(\dfrac{1}{2^3}+\dfrac{1}{3^3}+......+\dfrac{1}{n^3}< \dfrac{1}{4}\)