Number system puzzle problem 8: Leftmost digit of a natural number at least 7 digits long is 3. When it is dropped, number becomes one-fifth...Read on.
Number system puzzle problem 7: Cube of a number exceeds its product with two other numbers by 2, the cube of the second number is less than...Read on.
Solve Number system puzzle problem 6 in 1 min: Product of a 2 digit number and number formed by reversing digits of the first is 2430. Find smaller number.
Number System Puzzle Problem 5: If 495 is subtracted from a 3 digit number with its digits reversed, you get the original number. Sum of digits...Read on.
Learn how to solve number system puzzle problem 4 in 1 min: The sum of thousands and tens digits in a 4 digit number is 4, the sum of hundreds...Read on.
Solve Number System Puzzle Problem 3 in 2 mins: Denominator of a fraction is less than the square of the numerator by 1. If 2 is added to both...Read on.
Solve number system puzzle problem 2 in 90 secs: What 2 digit number is less than sum of squares of its digits by 11 and exceeds their doubled product by 5?
9 squares puzzle: Find area of rectangle with 9 gradually smaller squares inside it and the side length of smallest square 3 units. Time 30 minutes.
Surely you can solve the 3 digit number puzzle in 20 mins if you approach the puzzle with systematic problem solving techniques.
What is in 2012th position of PROBLEMSOLVINGPROBLEMSOLVING... continued indefinitely? To solve the repetition pattern riddle, find a rule in repetitions.
