# Flipping Digits Puzzle

#### Difficulty: Easy

### This puzzle is based on one of my math tricks.

__These are the only 4 digits allowed in this trick:__

Using addition or subtraction, can you figure out how to turn one number into another in the exercises below?

__Exercises:__

- Turn
**999** into **999,666** in 2 moves.
- Turn
**6,969** into **9,696** in 2 moves.
- Turn
**99,999** into **66,966** in 1 move.
- Turn
**999,666,999** into **96,969** in 3 moves.
- Turn
**699,996** into **966,669** in 2 moves.
- Turn
**666,969,999** into **66,999** in 1 move.
- Turn
**999,999** into **969,999,696** in 2 moves.

## P.S.: Make sure that the sums & differences only have 6's or 9's as digits!

Give up? Click here for the answer!

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© Derek Cumberbatch