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How many two-digit numbers are there such that the two digits differ by exactly two?
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How many two-digit numbers are there such that the two digits differ by exactly two?

User Ginnie
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1 Answer

4 votes

Answer:

Two-digit number ab: a = b + 2

20, 31, 42, ..., 97 ==> 8 numbers

b = a + 2, 8 numbers

8 + 8 = 16 numbers

Explanation:

User Chuks
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