1. , , , 63.
2. 15 . , , . ? ( .)
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3. 4 , .
4. , ?
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5 4 , 4 , 18 . ?
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6. : 7 5 . . , ?
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7. . .
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8. , , , . , , , ?
9. 20 . ?
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10. 7 . ?
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11. 12 . , . , ?
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12. . , ?
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13. , . , . .
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14. 2 , 2 , 2 , 2 . ?
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15. 10 . ?
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16. . , . ?
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17. , . 2 . ?
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18. 1, 2, 3 : , . 1 2 . 1. ?
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19. :
, 1?
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20. : . , , . . . ?
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21. , :
9 9 9 = 2 | 9 9 9 = 90 |
9 9 9 = 10 | 9 9 9 = 9 |
!