forehead / horizontal tablet or inscribed board / specified number or amount
额
=
客
+
页
:
Albert Einstein (Ø) and his guest (客) are playing a game of 20 questions just inside the elevator's kitchen (e2). They both have sheets of paper (页) fixed to their foreheads (额) with a name on each to guess.
吉
=
口
+
士
:
Mnemonic symbol: "Giga" stems from a Greek word for "giant", so I'll represent 吉 by a giant.
吉
=
口
+
士
:
The giant just arrived at the space station and is very hungry. In each hand he holds Joan of Arc and the bachelor captive and robs them for their mandarins which he longs for.