Cold and Warm riddle
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Starting with ‘COLD’, change one letter at a time until you have the word ‘WARM’.
Each change leaves the other letters in their original places and must result in a proper word.
What is the minimum number of steps required to achieve this change? 
Minimum number of steps: 4 (as each letter has to change at least once.)
COLD -> CORD -> WORD -> WORM -> WARM
OR
COLD -> CORD -> WORD -> WARD -> WARM
OR
COLD -> CORD -> CARD -> WARD -> WARM
Your Answer
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