Question

10, 40, 60, 72, 78. (?)​

Answer 1

Answer:

sorry not knowing...............

Answer 2

Answer:

80

Step-by-step explanation:

10 + ( 6x5 ) = 10 + 30 = 40

40 + ( 5x4 ) = 40 + 20 = 60

60 + ( 4x3 ) = 60 + 12 = 72

72 + ( 3x2 ) = 72 + 6 = 78

78 + ( 2x1 ) = 78 + 2 = 80