B.....is has division...................
In the box where 'Tails' and 'Not six' is, write 68. Then right under that you ADD 50 and 68. Then under 'Six' and 'Tail' you MINUS 79 and 68. And finally under that one you ADD 21 and the answer you got.
So in the end this is how it should look:
The cubed root of 2,744 is 14.
The answer is b. 2.5 x 10^5