Riddles - 2

Puzzle - 1:

How many triangles and quadrilaterals are there in this diagram?

Puzzle - 2:

Eight squares of paper, all exactly the same size, have been placed on top of each other so that they overlap as shown:

In what order were the sheets placed?

Puzzle - 3:

Several people of different ages brought things for the party: Charlie, who's 12, brought the POTATO CRISPS. Wayne brought the FIZZY LEMONADE (he's 13). Helen (11) brought the PAPER PLATES, and her brother Peter (9) brought the PAPER CUPS. Sheila is the same age as Charlie: she brought the PARTY POPPERS. Young Horace brought the PEANUTS: how old is he? Have a great party!

"What day do you go back to school, Horace?" asked his grandmother one day.

"Well," Horace replied, "Nine days ago, the day before yesterday was three weeks before the second day of term."

If Horace had this conversation on a Sunday, what day of the week did he start school?

Puzzle - 4:

"What day do you go back to school, Horace?" asked his grandmother one day.

"Well," Horace replied, "Nine days ago, the day before yesterday was three weeks before the second day of term."

If Horace had this conversation on a Sunday, what day of the week did he start school?

Puzzle - 5:

A 1-metre stick is broken into two pieces at random. What is the length of the shorter piece, on average?