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Sunday, November 20, 2016

Riddles - 2 [With Answers]

Answers for the previous puzzles

Puzzle - 1:

How many triangles and quadrilaterals are there in this diagram? 
Answer:


64 Triangles

36 Quadrilaterals

Total: 100 shapes.

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?


Answer:

The paper squares were placed in this order: CEBFHGDA

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?

Answer: 7

(Count the letters!)

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?

Answer: The reasoning runs as follows: 

Today is Sunday.

So seven days ago was Sunday too. That means that NINE days ago was Friday.

On Friday, the day before yesterday was Wednesday.

Three weeks later is Wednesday again.

That is the second day of term.

So the term began on Tuesday. Wasn't that easy?



Puzzle - 5:

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

Answer: The shorter piece will be randomly from 0cm to 50cm long, with an average of 25cm.

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