Maths Tricks Part Two

This video presents three math tricks that can be used as lesson starters or to impress friends. The first trick involves manipulating a number between 1 and 8 to reveal the original number and the digit 2. The second trick results in the number 3 after a series of operations. The final trick involves three-digit numbers, where reversing and subtracting the digits leads to a sum of 18. Each trick is explained with examples.

What is the requirement for the three-digit number in the final maths trick?

What will the sum of the digits in the result of the final maths trick always be?