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

this was an IQ genius test

answered Apr 24, 2013 by (140 points)
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.

answered Apr 25, 2013 by anonymous
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!!!!
answered Apr 26, 2013 by anonymous
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
answered Apr 26, 2013 by anonymous
The answer is 9 = 60
answered Apr 26, 2013 by anonymous
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
answered Apr 26, 2013 by anonymous
60

so

last number is 6 = 42 so

9 = (9x2) or 18 + 42

9 = 60
answered Apr 26, 2013 by anonymous

#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;
answered Apr 27, 2013 by anonymous
9 = 20,10 = 33,11 = 48,12 = 65,13 = 84
answered Apr 27, 2013 by anonymous
7=56 8=72 9=90
answered Apr 27, 2013 by anonymous

# 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

answered Apr 29, 2013 by anonymous
2=6

3=12

4=20

5=30

6=42

7=49

8=58

9=67

Antwoord = 67
answered Apr 29, 2013 by anonymous
90

2x3=6 3x4=12 4x5=20 5x6=30 6x7=42 7x8=56 8x9=72 9x10=90
answered Jun 5, 2013 by anonymous
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
answered Jun 5, 2013 by anonymous

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

answered Jun 7, 2013 by anonymous

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)

answered Jun 7, 2013 by anonymous
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?
answered Jun 8, 2013 by anonymous
2*3 3*4 4*5 . . . .9*10=90
answered Jun 8, 2013 by anonymous
9=then 9
answered Jul 2, 2013 by anonymous
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.
answered Aug 1, 2013 by Cashew Nuts
answered Oct 3, 2013 by haikal
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;
answered Oct 5, 2013 by monika ghodake
Asnwer is 70.
answered Nov 8, 2013 by anonymous

6/2 =3

12/3 =4

20/4 =5

30/5 =6

42/6 =7

So

x/9 =8

x =9*8

x =72

answered Nov 11, 2013 by anonymous

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

answered Nov 12, 2013 by Marcus Alexandre Silva
6-4(3-5)2+30/5
answered Nov 14, 2013 by Tyrone
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
answered Dec 5, 2013 by Moises
if 2 = 6, 3 =12, 4 = 20, 5 = 30, 6 = 42 then 9 = ? my answer?
answered Dec 8, 2013 by mustansar nazar
9=90
answered Dec 8, 2013 by anonymous
8*9=72
9 x 8=72
9 = 56
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
answered Mar 28 by Big Fred
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.
answered Mar 30 by Ben Estes
answered 3 days ago by manoj rawal

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