A number is much greater than 21 as is less than 71 . the number is ?
A. 41
B. 39
C. 49
D. 46
Solution (By Examveda Team)
Let number is X greater than 21 and X less than 71.
Now according to question,
21 +X = 71 - X
2X = 50
X = 25
So, Required number is 21+X = 21 +25 = 46.
Alternatively,
The required number would be the average or mean of 21 and 71. So
Required number = (21 +71)/2 = 46.
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Let ,the number be x.
From the question,
x-21=71-x
or, 2x=92
ans:x=46[46-21=25,
71-46=25]
short cut:
required number
=(71+21)/2
=46
(21+71)/2=46