Question

Find the missing number.
15, 25, 40, 65, ?, 195
(1) 115 (2) 110
(3) 90 (4) 105

Answer 1

105 just add 65 and 40...

Answer 2

Answer:

The right answer is option (2) 110

Step-by-step explanation:

Explanation

To find the number first we multiply by series by 2  

15×2=30-5=25

15 multiply by 2=(30) and subtract 5 we get 25

25×2=50-10=40

25 multiply by 2=(50) and subtract 10 we get 40

40×2=80-15=65

40 multiply by 2=(80)and subtract 15 we get 65

65×2=130-20=110

65 multiply by 2=(130) and subtract 20 we get 110

110×2=220-25=195

110 multiply by 2=(220) and subtract 25 we get 195

The new series become  

15,25,40,65,110,195