8, 40, 20, 100, 50, __, 125
Answers
Answer:
8 x 5 = 40
40 - 40/2 = 20
20 x 5 = 100
100 - 100/2 = 50
50 x 5 = 250
250 - 250/2 = 125
So,
for blank space number is :- 250 answer
250 is the missing number.
8, 40, 20, 100, 50, 250 , 125
Step-by-step explanation:
Given:
8, 40, 20, 100, 50, __, 125
To find:
The missing number
Solution:
This series is a numerical sequence in which the numbers are arranged orderly and make a sequence.
The pattern is (x₁,x₂,x₃,x₄,x₅,x₆) are the numbers in the series thus x₁, (x₁÷2)×10⇒x₂, (x₂÷2)⇒x₃, (x₃÷2)×10⇒x₄, (x₄÷2)⇒x₅, (x₅÷2)×10⇒x₆.
The first number is divided by 2 and multiplied by 10. Thus we get 40, the second number.
8 ⇒40
⇒(8÷2)×10
⇒4×10
x₁⇒40
The second number 40 is divided by 2 . Thus we get 20, the third number.
40⇒20
⇒40÷2
x₂⇒20
The third number 20 is divided by 2 and multiplied by 10. Thus we get 100, the fourth number.
20⇒100
⇒(20÷2)×10
⇒10×10
x₃⇒100
The fourth number 100 is divided by 2. Thus, we get 50, the fifth number.
100⇒50
⇒(100÷2)
x₄⇒50
The fifth number 50 is divided by 2 and multiplied by 10. Thus we get 25 the sixth number.
50⇒?
⇒(50÷2)×10
⇒25×10
x₅⇒250
The sixth number 50 is divided by 2 and multiplied by 10. Thus we get 25 the sixth number.
250⇒125
⇒250÷2
x₆⇒125
Hence,
The missing number in the series is 250.
8, 40, 20, 100, 50, 250 , 125