Complete the series by adding the next number: 0,0,1,2,2,4,3,6,4,?

Answer 1

It is a combination of two sequence of + 1 and + 2 addition

                    0   ,    0    ,    1   ,  2    ,2      ,4     ,3      ,6      ,4

adding +1 ;;;     0   , 1  ,  2   .     3    , 4       and adding + 2       ::  0  , 2  , 4  , 6   .  , so next term is 8 ;;;
all even numbered terms                                      all odd numbered terms

Answer 2

This series 0,0,1,2,2,4,3,6,4,? contain two series
0,1,2,3,4...(add +1 for next term ) and 0,2,4,6,...(add +2 for next term )
so next term is 8.

Answer 3

b1*a1=c1;
b2*a2=c2; c2-c1=e1;
b3*a3=c3; c3-c2=e2;
etc

0*0=0;
1*0=0; 0-0=0;
2*1=2; 2-0=2;
2*2=4; 4-2=2;
4*2=8; 8-4=4;
3*4=12; 12-8=4;
6*3=18; 18-12=6;
4*6=24; 24-18=6;
8 *4=32; 32-24=8

Answer 4

In this series contains two series
normal numbers(like 0,1,2,3) and even numbers(like 0,2,4,6)
and the next number is 8