More Number Series

1. 18,20,10,12,4,6 ?
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2. 7,6,8,5,3,7,?
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3. 9,18,21,25,20,?
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4. 3,3,4,8,10,36,?
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5. 30,28,25,20,34,28,?
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6. 4,8,16,32,64,128,?

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7. 8,16,24,32,40,48,?
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8. 13,11,14,12,15,13,?

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9. 6,18,36,108,216,648,?
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10. 4,4,8,8,16,16,?

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11. 2,6,18,54,162,486,?

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12. 4,20,35,49,62,74,?

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13. 10,18,15,23,20,28,?

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14. 4,10,8,14,12,18,?

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15. 10,15,12,17,14,10,?

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