Voiceover: In a world without maths,a land where people forgot, who will save the day? Mr Sharma: Errrrr, Ooooo…1, 2, 3, 4, 5, where’s the next box? Aww why can ...

The array can be shown as 5 groups of 3 showing that 5 x 3 = 15. Or it could be shown as 3 groups of 5 showing that 3 x 5 = 15. This demonstrates that multiplication is commutative. Image caption, ...

Excel's basic formulas work fine for simple calculations, but they quickly become cumbersome when you're dealing with complex data analysis. You end up with nested functions that are hard to read, ...