## Tuesday, March 24, 2020

### The Funny Calculator

A calculator has these buttons:

Just like a “normal” calculator,

When you type 1 x 10, it says 10.
When you type 1 + 10, it says 11.

But…

When you type 1 + 1, it says 10.
When you type 10 + 10, it says 100.

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Using this information alone:

How would you count from one to four?

What would the calculator say if you typed in 100 10 ?

Extending the pattern:

Can you extend the pattern to count up to twenty?

What would the calculator say if you typed in 0.1 + 0.1?

What would the calculator say if you typed in 0.1 x 10 ?

What would the calculator say if you typed in 111 + 111 ?

What would the calculator say if you typed in 111 x 10 ?

## Saturday, March 21, 2020

### Counting triangles!

How many triangles are there in this picture?

It's not so easy.....

For the solution, click "Read More" below.

### PLAYFUL MATH BLOG CARNIVAL #163

BLOG CARNIVAL #163....LET'S GO! Fun fact: The number 163 is prime, which we can prove simply by showing that it is not divisible by 2, 3...