The missing number is 1,620. The digits in the tens places (green in the figure below) of the numbers in columns 1, 2, 4 and 5 are added together. The total value is represented by the digits in the ...

Maths has always been a subject that sparks intense debate. While it's a subject that many find challenging, it's also one ...

Brain teasers are puzzles that challenge your thinking and problem-solving skills. Solving brain teasers helps improve memory, concentration, and ability to think creatively. Whether you're looking to ...