if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

Question

this was an IQ genius test

Answer 1

The answer is 56

Answer 2

I can't believe the variety of answers to this question. Including 81, which I've yet to see someone actually offer the math for.

People say that it depends on what "valid" variable you us, or that you have to assume this or that in the "missing" pattern, but you really don't.

The simple formula for this is x^2+x=y or if you want, x*x+x=y.

You don't even have to calculate the "missing" numbers.

9*9+9 = 81+9 = 90. So y=90.

The answer is:90

Answer 3

I got 56!

6 x 1 = 6 +6 = 12 (the next answer)

12 x 1 = 12 + 8 = 20 (the next answer)

20 x 1 = 20 + 10 = 30 (the next answer)

30 x 1 = 30 + 12 = 42 (the next answer)

42 x 1 = 42 + 14 = 56!!!!

Answer 4

If the multiplier is the unknown variable the pattern revealed below is possible by adding 1 to the multiplier. 9 would be 90

2x3 = 6

3x4= 12

4x5 = 20

5x6 = 30

6x7 = 42

7x8 = 56

8x9 = 72

9x10 = 90

Answer 5

The answer is 9 = 60

Answer 6

2 = 6  2x3 =6

3 = 12 3x4 =12

4 = 20 4x5 = 20

5 = 30 5x6 = 30

6 = 42 6x7 = 42

7 = 49 7x8 = 56

8 = 64 8x9=72

9 = 90 9x10 = 90

Answer 7

60

pattern is 2x current number added to the previous answer

so

last number is 6 = 42 so

9 = (9x2) or 18 + 42

9 = 60

Answer 8

 

#include <stdio.h>

 

int main (int argc, const char * argv[]) {

   

    int n=0; int x=0;

    

    while( n++ < 20 )

    

    {

            

    x = n * ( n + 1 ); 

    printf("%i : %i \n", n, x);

  

             

    }

   return 0;

Answer 9

9 = 20,10 = 33,11 = 48,12 = 65,13 = 84

Answer 10

7=56 8=72 9=90

Answer 11

 

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

 

6+3*2=12

12+4*2=20

20+5*2=30

30+6*2=42  then 

42+9*2=60

Answer 12

2=6

3=12

4=20

5=30

6=42

7=49

8=58

9=67

Antwoord = 67

Answer 13

90

 

2x3=6 3x4=12 4x5=20 5x6=30 6x7=42 7x8=56 8x9=72 9x10=90

Answer 14

If 2 = 6,  ( 2 x 3 added to 6 = 12) hence  3 = 12: And 2 x 4 added to 12 = 20, hence 4 = 20,  And 2 x 5 added to 40 = 42, then 2 x 9 added to 42 = 60,

 

Therefore 9 = 60

Answer 15

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

2=6(4)

3=12(6)

4=20(8)

5=30(10)

6=42(12)

7=56(14)

8=72(16)

9=90(18)

10=110(20)

 

 

9=90

 

 

 

 

Answer 16

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

2=6(4)

3=12(6)

4=20(8)

5=30(10)

6=42(12)

7=56(14)

8=72(16)

9=90(18)

 

Answer 17

So I got "60" w a pattern of escalation by 2 each time. But my i see reasoning for "56" and "90".  So what is THE answer?

Answer 18

2*3 3*4 4*5 . . . .9*10=90

Answer 19

9=then 9

Answer 20

it can be solved with 2 methods. 1st method. 2x3=6 3x4=12 4x5=20 5x6=30 6x7=42 then 9x10=90 2nd method 2x2=4. 4+2=6 3x3=9. 9+3=12 4x4=16. 16+4=20 5x5=25. 25+5=30 6x6=36. 36+6=42 then 9x9=81. 81+9=90. So 90 is the Correct Answer.

Answer 21

the answer is 90

Answer 22

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ? 2+1=3,2*3=6 3+1=4,3*4=12 and so on..... so 9+1=10,9*10=90;

Answer 23

Asnwer is 70.

Answer 24

6/2 =3

12/3 =4

20/4 =5

30/5 =6

42/6 =7

The answer keeps increasing by1.

So 

x/9 =8

x =9*8

x =72

Answer 25

Para ser 90, a matriz precisava deixar claro que existe o 7 e 8.

Isto não ocorre. Acredito que o resultado mais provável seja 58, pois o resultado é sempre a soma dos números da esquerda , diagonal acima e superior + 1:

12 =( 6 + 3 + 2) + 1

20 =(12 + 4 + 3) + 1

30 = (20 + 5 + 4) + 1

42 = (30 + 6 + 5) + 1

?? = (42 + 6 + 9) + 1 = 58

Answer 26

6-4(3-5)2+30/5

Answer 27

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ?

I think is: Number X Next position Number from the given variables.

2 = 6 , so 2x3=6

3 = 12, 3x4=12

4 = 20, 4x5 = 20

5 = 30, 5x6 = 30

6 = 42, 6x7 = 42

9  = 9x10 = 90

Answer 28

if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ? my answer?

Answer 29

9=90

Answer 30

8*9=72

Answer 31

9 x 8=72

Answer 32

9 = 56

Answer 33

This is easy..The answer is simply... 9

once you guys realize that this isn't really a math problem & that the whole equation is incorrect..Then you'll understand why...the answer is..... 9

Answer 34

2 = 6

3 = 12 (+ 6)

4 = 20 (+ 8)

5 = 30 (+ 10)

6 = 42 (+12)

7 = 66 (+14)

8 = 82 (+ 16)

9 = 100 (+ 18)

Each successive number is arrived at by adding a progressively larger number (larger by 2) to the result.

Answer 35

90 answers

Answer 36

9. Or, if you're willing to accept the abuse of the equality sign in the proposition, continue the pattern "x=x*(x+1)" to get 90.

Answer 37

7 and 8 are not there ... use the numbers shown ..... add 2 numbers plus the previous total to get the next total 3+3+6=12 / 4+4+12=20 / 5+5+20=30 / 6+6+30=42 / 9+9+42=60

 

Answer 38

2x3=6

3x4=12

4x5=20

.............

9x10=90!!!

Answer 39

The answer is 9

Answer 40

the answer is simple, the answer is there is no answer, because 2 does not equal 6 and 3 does not equal 12 and so on, true there is a patern but that's just there to trick you, but what if there wasn't a patern? most people would have got the answer because they gave up on what they learned at school or what they were taught

Answer 41

My answer is 72

Answer 42

posible answer is 72

Answer 43

30. Because 2=6=42.

Answer 44

9+(9*9)=90

Answer 45

2=2x3=6

3=3x4=12

4=4x5=20

...

9X10=90

Answer 46

answer is 56

Answer 47

Este problema no tiene solucion, o bien, no tiene una solucion unica.

Si se pretende seguir un razonamiento matematico a este problema, ya de partida las condiciones iniciales no lo son, por ejemplo, 2 no es igual a 6.

Saludos

Answer 48

The answer is actually 90

Answer 49

56 because 7 x8 is 56

Answer 50

i think its 56

Answer 51

9 = 9

Answer 52

The answer is 56. I worked it out if 2=6   3=12    3x2 = 6 ....4x3=12....5x4=20...6x5=30....9x6=54

Answer 53

You have to think Algebra for some of those who say it's not a mathematical problem!

9=90

Think of it the way...

9y=90

Y=90

Adding 1 each time! Finishing the missing numbers instead of jumping from 6 to 9. It makes sense... 9y=90!

Answer 54

9=90

9y=90

Y=10

You must think alegebra for those of you who say it's not an answer!

Answer 55

Each answer after the first has 2 added to it. Looking at the pattern of answers, the final answer is 78.
 

Answer 56

x * (x+1) = y

9 * (9+1) = 90

Answer 57

I got 90 2•3=6 3•4=12 4•5=20 5•6=30 6•7=42 7•8=56 8•9=72 9•10=90

Answer 58

I'm not going through the math because several already have.  The correct answer is 90 because the numbers 2, 3, 4, 5, and 6 in the problem constitutes numbers in a sequence to infinity with the answer being where number 9 is within the sequence.  For the answer to be anything else, then 2, 3, 4, 5, and 6 would have to all be random numbers, which they are not and there is nothing in the problem to indicate the numbers are random.

Answer 59

it is easy because 9 times 10 = 90 so answer = 90

Answer 60

As written the answer is 56,

Answer 61

90. Because, 2 x 3 = 6 3 x 4 = 12 4 x 5= 20 5 x 6= 30 6 x 7= 42 9 x 10= 90

Answer 62

100. each number in the right hand column increases by 2 as it is added.
6+6=12
12+8=20
20+10=30
30+12=42
42+14=56 (not shown)
56+16=82 (not shown)
82+18=100

Answer 63

i got 90... What is the correct answer?

Answer 64

It's just a next in series question. It is written incorrectly.   You don't have to be a genius to answer it (correctly), but you do have to leave out assumptions.  I'm amazed at how hard so many people worked to get the answer wrong.  A perfect example of why the world is struggling today.  Taking a simple task, making it harder than it needs to be and then complicating yourself into the wrong answer.  -  Yes, I know I didn't provide it, because if I do, many will tell me how stupid I am based on their incorrect answer,  which in turn just supports my comment.

Answer 65

2=6,3=12,4=20,5=30,6=42,7=56,8=72 et 9=90

Answer 66

What makes me want to go 9x8 instead of 9x10? I must be dyslexic.

Answer 67

90 is the answer that I received.

Answer 68

2(*3)=6. 3*4=12 4*5=20 5*6=30 6*7=42 then 9*10 =90. The answer is 90