Numbers in Basic Measurement

19 July 2016


  1. a) A fun exercise.Think of a three-digit number:

Do not use duplicates

Example 1

693
Reverse it 396
Subtract smaller figure from larger 297
Multiply by 2 594
Reverse it 495
Add these together 1089

Example 2

423
Reverse it 324
Subtract smaller figure from larger 99
Multiply by 2 198
Reverse it 891
Add these together 1089

The final answer will always be 1089