Question

If 8=56 7 =42 6=30 5=20 what does 3=

Answer 1

3=6
The pattern is simple.
8=56 (8x7=56)
7=42 (7x6=42)
6=30 (6x5=30)
5=20 (5x4=20)
so if you continue the pattern
3=6 (3x2=6)

Answer 2

8·7=56⇒8=57
7·6=42⇒7=42
6·5=30⇒6=30
5·4=20⇒5=20
4·3=12⇒4=12
3·2=6⇒3=6