Question

Number in squence


5,20,10,30,15,40

and say how did you do it
​

Answer 1

number next in the sequence = 20

Explanation:

5, 20, 10, 30, 15, 40, (20) ---> (40 - 20 = 20)

+15 -10 +20 -15 +25 (-20) ---> (25 - 45 = -20)

-25 +30 -35 +40 (-45)