MATHS QUIZ NO 12 NEXT NUMBER 2

WHAT IS THE NEXT NUMBER
1. 43, 616, 63242, 444394507
2. 5, 13, 23, 37, 47
3. 7, 10, 17, 27, 42, 66
4. 13, 24, 45, 86, 167
5. 34, 48, 71, 110
6. 1, 2, 5, 10, 17, 26, ... 37
7. 1, 11, 21, 1211, 111221
8. 1, 3, 6, 11, 20, 37, ... 70
9. Take a 3 by 3 square. The first row reads: 3, 5, 8. The second one: 4, 1, 7 and the last one: 14, 12, ?? Which number is missing? 30
10. What's the sum of the numbers 1 to 20? 210
11. 120, 60, 40, 30, 24, ... 20
12. 0, 2, 6, 12, 20, 30, 42, 56, 72, ... 90
13. Take a 3 by 3 square. The first row reads: 9, 1, 7. The second row: 8, 2, 4. The third row: 7, 3, ... 1
14. 100, 81, 64, 49, ... 36
15. 4, 9, 25, 49, 121, 169, ... 289
16. 1, -1, 2, -3, 4, -7, 6, -11, 8, -15, 14, ... -17
17. 2, 4, 9, 28, 125, 726, ... 5047
18. Take a 3 by 3 square. The first row reads: 1, 3, 10. The second: 2, 2, 8 and the third: 3, 1, ... 6
19. 1, 2, -1, -4, -9, -54, -61, ... -488
20. When I add up the numbers 10, 20, 30, ..., untill 200 (200 included), what will be the sum? 2100
1. 43, 616, 63242, 444394507
2. 5, 13, 23, 37, 47
3. 7, 10, 17, 27, 42, 66
4. 13, 24, 45, 86, 167
5. 34, 48, 71, 110
6. 1, 2, 5, 10, 17, 26, ... 37
7. 1, 11, 21, 1211, 111221
8. 1, 3, 6, 11, 20, 37, ... 70
9. Take a 3 by 3 square. The first row reads: 3, 5, 8. The second one: 4, 1, 7 and the last one: 14, 12, ?? Which number is missing? 30
10. What's the sum of the numbers 1 to 20? 210
11. 120, 60, 40, 30, 24, ... 20
12. 0, 2, 6, 12, 20, 30, 42, 56, 72, ... 90
13. Take a 3 by 3 square. The first row reads: 9, 1, 7. The second row: 8, 2, 4. The third row: 7, 3, ... 1
14. 100, 81, 64, 49, ... 36
15. 4, 9, 25, 49, 121, 169, ... 289
16. 1, -1, 2, -3, 4, -7, 6, -11, 8, -15, 14, ... -17
17. 2, 4, 9, 28, 125, 726, ... 5047
18. Take a 3 by 3 square. The first row reads: 1, 3, 10. The second: 2, 2, 8 and the third: 3, 1, ... 6
19. 1, 2, -1, -4, -9, -54, -61, ... -488
20. When I add up the numbers 10, 20, 30, ..., untill 200 (200 included), what will be the sum? 2100