What's new

mathematical sciences posts

A list of letters Brainteaser

by David, 21 August 2018 | 0 comments

Brain icon

Can you work out the next letter in this sequence? H, T, Q, F, S, S, E, N, … Hint: There are numbers lurking behind those letters. And as it grows, this sequence is shrinking!

Continue reading A list of letters

Categories:

Broken calculator Brainteaser

by David, 8 August 2018 | 4 comments

Brain icon

Imagine your calculator is broken. Although it will still display numbers, only the 4 key, + key, = key and clear key work. Starting at 0, can you get the calculator to display 1000? What’s the fastest way, with the fewest button presses?

Continue reading Broken calculator

Categories:

How old is my mum? Brainteaser

by David, 25 July 2018 | 0 comments

Brain icon

Twenty years ago, my mum was twice my age. I’m 42 years old. How old is my mum?

Continue reading How old is my mum?

Categories:

Numbers and letterboxes Brainteaser

by David, 11 July 2018 | 0 comments

Brain icon

Tomas is putting a number on a letterbox. He puts on one digit. Then he adds another digit. Tomas looks at it and notices that it makes a number exactly five times the first digit. Tomas adds a third and final digit. Once again, Tomas looks at the number and notices that the three digit…

Continue reading Numbers and letterboxes

Categories:

Fractional puppies Brainteaser

by David, 27 June 2018 | 0 comments

Brain icon

Kelly has a pet store. She recently got in a whole litter of puppies and tried to sell them all. On the first day, she sold half of the puppies, plus half a puppy.

Continue reading Fractional puppies

Categories:

Which bus? Brainteaser

by David, 13 June 2018 | 4 comments

Brain icon

I caught a bus the other day with a very interesting number.

Continue reading Which bus?

Categories:

Lots of eights brainteaser Brainteaser

by David, 30 May 2018 | 0 comments

Brain icon

I want to find a number that is divisible by three. I also want all of its digits to be 8s. Does my number exist?

Continue reading Lots of eights brainteaser

Categories:

Play Scopa Activity

by David, 17 May 2018 | 0 comments

Some playing cards

Here’s a traditional card game that’s bound to get your brain pumping. Being able to add up will help, but there’s plenty more to puzzle over!

Continue reading Play Scopa

Categories:

Half of 12 brainteaser Brainteaser

by David, 16 May 2018 | 0 comments

Brain icon

You probably know that half of 12 is six. But the other day, I caught a glimpse of a clock peeking between buildings. At that moment, I noticed that sometimes, half of 12 is seven. How is this possible?

Continue reading Half of 12 brainteaser

Categories:

Square and cube number brainteaser Brainteaser

by David, 2 May 2018 | 1 comments

Brain icon

When you multiply a whole number by itself, you get a square number. When you take three copies of a whole number and multiply them all together, you get a cube number. There’s only one two digit number that is both a square and a cube. Can you work out what number it is?

Continue reading Square and cube number brainteaser

Categories: