Amazing clock made up of all 9s
Category Archives: Maths
Number 7 Divisibility Test
Can one person make a difference?
Can one person make a difference? The first domino is so small, it’s 5mm tall and only 1mm thick, In this chain reaction, the 26th domino would be as tall as the Empire State Building (381 meters tall)
Maths: Fractions
Maths: Fractions
PI Value = May I have a large container of coffee
How to easily remember PI value!
Percentages are reversible
Percentages are reversible, so 6% of 50 is equal to 50% of 6; which is much easier to calculate.
Smallest 9 digit number which contains 26 distinct primes
165479283 is the smallest 9 digit number which contains 26 distinct primes looking forwards and backwards. The 26 primes are 2, 3, 5, 7, 29, 47, 61, 79, 83, 97, 283, 479, 547, 829, 4561, 5479, 6547, 8297, 9283, 16547, 65479, 74561, 79283, 165479, 2974561, 65479283
Remove a digit, one at a time, and the results continue to be prime number
Mathematics. Remove a digit, one at a time, and the results continue to be prime.
What a beautiful equation using 10, 11, 12, 13 and 14 squares…
What a beautiful equation
Fun Fact: No number from 1 to 999 contains the letter A in its english spelling
Fun Fact No number from 1 to 999 contains the letter A in its english spelling! The first number spelling which contains Alphabet ‘A’ is ‘Thousand’