How many

How many double-digit numbers greater than 30 we can create from digits 0, 1, 2, 3, 4, 5? Numbers cannot be repeated in a two-digit number.

Result

n =  14

Solution:

n=1⋅ 5+2⋅ 6−3=14n=1 \cdot \ 5 + 2 \cdot \ 6 - 3=14

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