What is the missing number? 12, ___, 18, 21, 24, 9, 22, 15, What is the following sequence counting by: 16, 20, 24, 28, ___, 4, 32, 3, What is the missing number? 24, ___, 30, 33, 25, 27, 22, What is the missing number? 32, 36, ____, 44, 40, 38, 42, what is the the difference (d) of the sequence: 21, 24, 27, ____, 33, 24, 3, 30, What is the missing number? 12, ____, 4, 0, 6, 9, 8, what is the the difference (d) of the sequence: 36, ____, 28, 24, 20, 4, 24, 32, What is the missing number? ___, 18, 15, 12, 24, 21, 27, 25, what is the the difference (d) of the sequence: 23, 30, ___, 44, 7, 3, 4, 6, what is the the difference (d) of the sequence: 28, 32, ____, 40, 44, 3, 5, 4, 7

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