I WENT TO SCHOOL WITH NO PEN I CAME BACK WITH 6 PENS WHA RID RIDDLES WITH ANSWERS TO SOLVE - PUZZLES & BRAIN TEASERS

Stairs! Did you answer this riddle correctly?
YES  NO  

The moon. Did you answer this riddle correctly?
YES  NO  

The moon Did you answer this riddle correctly?
YES  NO  

The periodic table. Did you answer this riddle correctly?
YES  NO  

XY Did you answer this riddle correctly?
YES  NO  

An itsy bitsy book. Did you answer this riddle correctly?
YES  NO  

Romeostasis Did you answer this riddle correctly?
YES  NO  

Because he was below "C" level. Did you answer this riddle correctly?
YES  NO  

Fear of utility bills. Did you answer this riddle correctly?
YES  NO  

H-E-L-L-O! Did you answer this riddle correctly?
YES  NO  

A clock. Did you answer this riddle correctly?
YES  NO  

Beetle. Did you answer this riddle correctly?
YES  NO  

P3 can only be certain of his cap if 1 & 2 are both white. Since he is not certain then 1 & 2 must be either white/red or red/red. 2 knows this but the only combination that he will be able to know the colour of his own cap is if he sees that 1 is wearing a white cap. 1 knows this but as 2 remains uncertain then 1 must be wearing a red cap. Did you answer this riddle correctly?
YES  NO  

The alphabet. Did you answer this riddle correctly?
YES  NO  

He slipped his discus. Did you answer this riddle correctly?
YES  NO