Question

Udla.

7. There is a series of seven numbers. It starts with 10 and keeps on increasing at an interval of
10. The range of the series is 60. Find the series of seven numbers.​

Answer 1

Answer:

10,20,30,40,50,60,70

Step-by-step explanation:

Since it is increasing by 10 , it means given series is an Arithmetic progression .

Range of series = al - a , here , Range = a7 - a = 60

a = First term = 10

d = Common difference = 10

an = a+(n-1)d

a2 = 10+(1)10 = 20

a3 = 10+(2)10 = 30

a4 = 10+(3)10 = 40

a5 = 10+(4)10 = 50

a6 = 10+(5)10 = 60

a7 = 10+(6)10 = 70

Confirmation :

a7-a = 70-10 = 60

Hence , the series :-- 10,20,30,40,50,60,70