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05 Jun 2018, 00:31
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C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
94% (01:01) correct
6%
(01:13)
wrong
based on 134
sessions
History
Date
Time
Result
Not Attempted Yet
If 84^2 + x = 8807, what is the value of x?
A. 1002
B. 1243
C. 1751
D. 1887
E. 1999
A. 1002
B. 1243
C. 1751
D. 1887
E. 1999
05 Jun 2018, 01:03
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Solution
Given:
- • \(84^2 + x = 8807\)
To find:
- • The value of x
Approach and Working:
In this case we don’t need to find out the value of \(84^2\), we can get the answer only by considering the unit digit
- • \(84^2\) will always be ending with the digit 6.
• The resultant number is ending with the digit 7
• Hence, the number which is added (x) should end with 1
- o From the options we can say x = 1751
Hence, the correct answer is option C.
Answer: C
General Discussion
05 Jun 2018, 02:44
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Bunuel
If 84^2 + x = 8807, what is the value of x?
A. 1002
B. 1243
C. 1751
D. 1887
E. 1999
A. 1002
B. 1243
C. 1751
D. 1887
E. 1999
\(84^2\) + x =8807
x=8807-\(84^2\)
x=8807-7056
x=1751
Thus the best answer is C.
