Question

descoperiti regula de compunere a sirurilor si completati cu inca 3 numere :
2,5,11,23,_,_,_
2,3,5,9,_,_,_
7289,3666,5469,_,_,_

Answer 1

2, 5, 11, 23, 47, 95, 191

2 + 3 = 5

5 + 2 × 3 = 5 + 6 = 11

11 + 2 × 6 = 11 + 12 = 23

23 + 2 × 12 = 23 + 24 = 47

47 + 2 × 24 = 47 + 48 = 95

95 + 2 × 48 = 95 + 96 = 191

2, 3, 5, 9, 17; 33, 65, 129

2 + 2⁰ = 2 + 1 = 3

3 + 2¹ = 5

5 + 2² = 9

9 + 2³ = 17

17 + 2⁴ = 17 + 16 = 33

33 + 2⁵ = 33 + 32 = 65

65 + 2⁶ = 65 + 64 = 129

7289, 3666, 5469, 2739; 4559; 1829

72 = 8 x 9

( 72 : 2) = 36 = 6 x 6

36 + 18 = 54 = 6 x 9

54 : 2 = 27 = 3 x 9

27 + 18 = 45 = 5 x 9

18 = 2 x 9