Answer:
12.
12 Is a multiple of 3, and its ones place is double the digit of its tens place.
(3,6,9,12)
1(tens place) x 2(ones place) = 2
It is also an even number.
(2,4,6,8,10,12)
36
Explanation:
think of multiples of 3 that have 2-digits
12, 18, 24, 30, 36 . . .
you will hit upon the one that works
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