Question

19. In which of the following patterns the next number is found by doubling the number before it?
(a) 5, 10, 15, 20, .....
(b) 5, 10, 20, 40, ..........
(C) 5, 7, 9, 11, .......
(d) 5.9, 13, 17, .........
20. In which of the following number, the place value of the coloured digit is not oqual to​

Answer 1

Answer:

b)5,10,20,40

Step-by-step explanation:

if we add 5 double time means it will be 5+5=10

if we add 10 double time means it will be 10+10=20

if we add 20 double time means it will be 20+20=40