1082 combinationsAnswer. A five button lock has 1082 combinations, so claiming “thousands of combinations” is a stretch. How many different ways are there...

Write any number from 100 to 999. 120 = one hundred twenty. 405 = four hundred five. 556 = five hundred fifty-six. 999 = nine hundred ninety-nine. What is...

So 98789 would be the largest 5 digit palindrome. What is the greatest 5 digit palindrome n such that 7n is a 6 digit palindrome? I made quick program and...

Examples: A sequence has nth term given by Un = 5n – 2. Find the value of n for which Un = 153. A sequence has nth term given by Un = n2 + 5. Find the val...

Others, however, are hard and may require you to be a math whiz. Many are plays on letters and words, so keep going if you’re undeterred. We even threw in...

The numbers game, also known as the numbers racket, the Italian lottery, or the daily number, is a form of illegal gambling or illegal lottery played most...

What is a good riddle? The simple answer is that a good riddle is one you like. For as we all know, we all have different taste. That is a riddle that you...

Seven was the most powerful magical number, based on centuries of mythology, science, and mathematics, and therefore had a very important role in the wiza...

Guiding Principles to Solve Chess Puzzles Write down your solutions. Chess is about effective decision-making. End each chess puzzle with a definite concl...

6,670,903,752,021,072,936,960There are 6,670,903,752,021,072,936,960 possible solvable Sudoku grids that yield a unique result (that’s 6 sextillion, 670 q...