IQ Tests : Number Sequences I - Fill in the blanks

IQ Tests in Logical Thinking : Number Sequences I

What number comes in the blank in each sequence below?

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1.
2, 6, 14, _______, 62, 126

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2.
4, 8, 16, 32, 64, _______

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3.
213, 426, _______, 852, 1065, 1278

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4.
2, 3, 5, 7, 11, 13, 17, 19, _______

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5.
243, 162, 108, 72, _______, 32

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6.
1/24, _______, 7/18, 10/15, 13/12, 16/9

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7.
1, 3, 6, 10, 15, _______

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