How many addition signs should be put between digits of 987654321
How many addition signs should be put between digits of 987654321 to equal 99? Where should they be placed? Time to solve 10 minutes.
How many addition signs should be put between digits of 987654321 to equal 99? Where should they be placed? Time to solve 10 minutes.
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.
Find area of equilateral triangle if side length of smallest of 3 squares inscribed in the triangle on top of each other is 1. It needs a bit of math.
Find the 10 digit number with each digit different and each number formed by first n digits divisible by n. Step by step solution by basic math explained.
Bank cashier mistake puzzle: Double the cheque amount less 20 paise received as Cashier interchanged paise with rupees. What were the cheque figures?