1 + 3 + 5 + … + (2n - 1) = n ² Visual proof: instagram.com/reel/DLQQUcwKO…

If the password is a 4-digit number, how many tries will it take to find the password?

Which one is bigger?

5 @ 3 = 82 4 @ 1 = 53 7 @ 2 = 95 6 @ 4 = ?

Who is right?

An interesting formula

Ask this question to your kid;

What is the hight of red bar?

Puzzle of the day

Which one is bigger?

Choose an option or find your own way

I just found this problem in my photo gallery

a + b + c = d a, b, c, d are prime numbers What is the minimum value of d?

Solve mentally

11, 13, 17, 19 23, 29 31, 37 41, 43, 47 53, 59 61, 67, 71, 73, 79 83, 89 97 Really interesting

Solve the following question without using a calculator. Time your solution with a stopwatch. Write your answer along with your solution time. Find the prime factors of 667.

* means a special operation

A real life problem. What is the height of the parrot?

Playing with numbers is fun