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Question 769912: The ones digit of a two-digit number is 4 less than its tens digit. What are the two digit numbers that satisfy these condition?
Answer by ramkikk66(644)   (Show Source):
You can put this solution on YOUR website! Put all possible values (starting from 0 upwards) in the 1's place.
Find out what the corresponding 10's digit would be - 1's place digit + 4.
Obviously if unit digit + 4 crosses 9, it is not valid. It has to be less than
or equal to 9.
So you have only the following numbers possible:
40, 51,62,73,84 and 95!
:)
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