4 , 16 , 8 , 40 , 20 , 120 , 60 , 420 , _______
can anybody know on the next number of the blank? because i dont get the pattern ... please help.
thanks guys.
Hello, rcs!
$\displaystyle \text{Find the next number: }\:4,16,8,40,20,120,60,420,\_\_$
Examine what happens between numbers . . .
. . $\displaystyle \begin{array}{cccccccccccccccccc} 4 && 16 && 8 && 40 && 20 && 120 && 60 && 420 && ? \\ & \times4 && \div2 && \times5 && \div2 && \times 6 && \div2 && \times7 && ? \end{array}$
Got it?