What is the answer for-_ 6,12,21,___ 48.What is the missing number?

Question

What is the answer for-_ 6,12,21,___ 48.What is the missing number?

Answer 1

okay here is how you solve this one.

6+6=12+9=21+12=33+15=48

it adds in multiples of three.so 3*2=6, then 3*3=9, then 3*4=12, and finally 3*5=15

I hope I was of help.

So the missing number is 21+12 which is 33.

Answer 2

PROBLEM: _, 6, 12, 21, __, 48...

ANSWER: 3, 6, 12, 21, 33, 48...

HOW: the progression of numbers is an addition of a multiple of three added to the existing number.

ex: Here's how the third and fourth numbers were placed.

      6 + (2*3) , or 12

     12 + (3*3) or 12 + 9 or 21

That means the entire line is:

3                              

6                              ------(3 + (1*3))

12                            ------(6 + (2*3))

21                            ------(12 + (3*3))

33                            ------(21 + (4*3))

48                            ------(33 + (5*3))

and so on ...

The first number is determined by subtracting the 6 you have with the (1*3) or 3.

Answer 3

3 and then not sure