Current location - Quotes Website - Signature design - Four model workers entered the conference room to attend the symposium, shaking hands with each other once and _ _ _ _ _ times. Sign the autograph book in turn, with _ _ _ _
Four model workers entered the conference room to attend the symposium, shaking hands with each other once and _ _ _ _ _ times. Sign the autograph book in turn, with _ _ _ _
( 1)(4- 1)×4÷2,

= 12÷2,

=6 (times);

(2)4×3×2× 1=24 (species);

Answer: shake hands six times and sign the autograph book in turn. There are 24 different signature sequences.

So the answer is: 6,24.