Calendar Question

Earlier I posted a calendar question. I asked if I was right? Apparently not. Thanks Mr C for commenting and clearing it up.

It's actually not correct (sorry Jacob). It happens every time 1 July falls on a Friday (obviously). This happened in 1949, 1955, 1960, 1966, 1977 and many other dates -- on average, about once every 7 years. The last time was in 2005.

Maths Song

This is Fun!

Puzzle

Mr Golan asked the class to see if they could find the sum of the first 50 odd numbers. As everyone settled down to their addition, Julia ran to him and said, "The sum is 2,500." Mr Golan thought, "Lucky guess," and gave him the task of finding the sum of the first 75 odd numbers. Within 20 seconds, Julia was back with the correct answer of 5,625.
How did she do this?

Fast Maths Trick - thanks to Jacob.

THANKS JACOB! (Year 6)

My Daughter's Question for YEAR 6

My daughter, who is in Year 5, loves to make up maths question for me. This is one of hers. Write down the answer on a piece of paper for a token!

I have a bag of lollies that is three quarters full. I eat 7 of the lollies and now the lollies number a multiple of 4. I then put 4 lollies back into the bag and it is now two thirds full. The amount of lollies in 3 bags is a multiple of 9 and over a 100. How many lollies would be in 1 bag?

YUMMY

Once Only

Okay, because so many of you can't do your homework tonight, I've decided to join the club rather than fight against it ..... and .... once only!

Calendar

How about that! Apparently this July there are 5 Fridays, 5 Saturdays and 5 Sundays. It only happens every 823 years. Am I right? Let me know.

The Monty Hall Problem

My Year 6's have asked me to explain this. The problem goes like this. There are three boxes. Only one of them has a prize. After you have picked a box, the game show host opens one of the other boxes that has nothing in it (the game show host knows what is in each of the boxes). He then gives you the chance to switch boxes or not. What do you do?

The Monty Hall Problem
(Make sure you have watched the YouTube video first)


The Monty Hall Problem -

Make 24

Make 24

Use the numbers once only in any order

Use any of the four operators (multiplication, division, subtraction, addition)

You may use brackets

1 2 3 8 = 24

Make 24

The second in our Make 24

Rules:

Use each number once only in any order

Use any of the 4 operators (multiplication, division, subtraction, addition)

You may use brackets

1 3 4 6 = 24

The answer is here. Do NOT look until you have tried for awhile!

Year 6 Year 7 and Year 8

Check out agoogleaday.com and let's have some fun!

Maths Puzzle

To my Year 6 students studying, Meaurement and the area of a square.

You have a square piece of paper measuring 10cm by 10cm. You would like a square piece of paper that has half that area (ie an area of 50 square cm). What is the easiest way of doing this?


Bring me the answer and get a token!

The horse was folded from one piece of square paper! WOW!