1) 4, 8, 12, 16, ......., .......... a) 20, 24 b) 18, 20 c) 17,18 d) 18, 19 2) ........... , 10, 15, 20, ......... a) 4 and 8 b) 5 and 25 c) 10 and 100 d) 10 and 20 3) 3, 6, ..... , 12, ......, 18 . a) 6 and 7 b) 9 and 10 c) 9 and 15 d) 12 and 15 4) 1, 4, ..., ..., 13 a) 6, 11 b) 7, 10 5) 3, 5, 7, 9. The rule of this pattern is.... a) +3 b) +2 c) -3 d) -2 6) 20, 18, 16, 14. The rule of this pattern is... a) -4 b) -3 c) +3 d) -2 7) 10, 20, 30. The rule of this pattern is... a) -10 b) +10 8) 15, 20, 25, 30. The rule of this pattern is ... a) +5 b) -5 9) 30, 40, ..., 60, ... a) 50, 70 b) 50, 80 10) 15, ..., 25, 30, ... a) 20, 25 b) 20, 35

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