A message from Patrick- 6th May 2020
Hello there!
Today I am going to put a number of maths puzzles here and you can all answer in the comments. Unfortunately, no gave there own one yesterday! I will put the challenges you make on this blog as long as you send them to me. Otherwise, I am happy to make my own (they are very fun to make).
I am thinking of a number:
- It is a three digit number
- It is less than the product of 8 and 25 (8×25)
- It is a square number (eg. 2×2=4, 4×4=16, 9×9=81, 15×15=225…)
- The factors of this number are prime numbers themselves (please comment what the definition of a primer number is)
- All three of its digits add up to more than 5
That one is very difficult. To make it even more challenging- YOU ONLY GET TWO GUESSES so you should check your answers and make sure it is right before you post in the comments!
Also:
How many triangles can you see?
You get as many guesses as you want for this one but I will only answer ‘correct’ or ‘incorrect’. No hints!
If you have any questions then as always please comment below or email me! I can give feedback on the writing competition plans or writing in general and I would love to see any extra work you have been doing so please send them as well!
Speak soon,
Patrick
Home learning links:
www.purplemash.com/sch/west-n15
www.westgreen.haringey.sch.uk/free-books-for-you/
www.westgreen.haringey.sch.uk/home-learning/
www.mymaths.co.uk/
www.ttrockstars.com
www.westgreen.haringey.sch.uk/computing/
www.westgreen.haringey.sch.uk/staying-fit-healthy-and-active/
www.westgreen.haringey.sch.uk/year-5-and-6/
Previous blog posts:
18 Comments
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Patrick Creane says:
Good job Davmie- I like that definition.
Have a good think about the number. Maybe make a list of possibilities like we did in class and get rid of the ones that it couldn’t be.
As for the triangles, unfortunately 5 is incorrect.
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Would you be able to give me some examples of prime numbers as well?
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Start with the square numbers as that will give you few options to eliminate
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Ok
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There are 7 triangles?
prime numbers:
2, 3, 5, 7, 9, 11, 13, 17, 19, 23,?
and just realized the prime numbers are odd but only the 2 is even.
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9 is not a square number as it has more than 2 factors: 9. 1 and 3
The rest are correct though! Good job!
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7 is incorrect
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There is only one answer remember Davmie! You also only get two guesses so try to narrow it down!
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Sophia says:
There are four triangles.
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Unfortunately not Sophia! I’m going to post it again tomorrow so we will have extra time!
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abdulhalim says:
there are 10 triangles
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That is not correct Abdulhalim.
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A prime number (or prime) is a natural number greater than 1 that has no other Factors other than 1 and itself.
Hmm.. i’ll have to think about that number your talking about, because it seems real hard.
And are there 5 triangles?