知
=
口
+
矢
:
Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).
趣
=
取
+
走
:
Cupid (qu) found a bloody ear (取) in the space station's bathroom (Ø4) and finds it very interesting (趣). He spears it with his nordic walking stick (走) and inspects this very interesting (趣) thing.