[latex]3=6[/latex] In this case, the pattern is the number, in this case, 3, multiplied by the number below it. See? [latex]8\times7=56\\7\times6=42\\6\times5=30\\5\times4=20\\3\times2=6[/latex] Hope this helped :)

[latex]8\rightarrow56=8\cdot7\\7\rightarrow42=7\cdot6\\6\rightarrow30=6\cdot5\\5\rightarrow20=5\cdot4\\\\4\rightarrow12=4\cdot3\\\\3\rightarrow6=3\cdot2\\\\Ans.\ 3\rightarrow6[/latex]