76,98,126,160,200,248,298 inappropriate one
Answers
Is this series inappropiate one is 200
Answer:
The one that is inappropriate in this series 248. The series would be perfect if 246 is there instead of 248.
Step-by-step explanation:
Given series: 76, 98, 126, 160, 200, 248, 298.
Step 1: Finding difference between the numbers.
76- 98 = 22; 98-126 = 28; 126- 160 = 34; 160-200 = 40; 200-248 = 48; 248 - 298 = 50.
Now the difference between series is : 22,28,34,40,48,50.
Finding the difference between the difference
22 -28 =6; 28-34 = 6; 34-40 =6; 40-48 = 8; 48-50 =2.
Since the difference between the last three numbers are different from the others in the series (i.e., 6). Find the common number in the last two difference. 48 is the common number in both. Upon backtracking it is clear that 48 is the outcome of 248. Therefore 248 is the odd man in this series.
When replacing 248 by 246 the series will become perfect.
76, 98, 126, 160, 200, 246, 298.
The difference of difference between each number will be 6 thus forms the perfect series.