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02 Dec 2014, 06:45
Kudos
Bookmarks
E
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
35%
(medium)
Question Stats:
65% (01:08) correct
35%
(01:34)
wrong
based on 174
sessions
History
Date
Time
Result
Not Attempted Yet
If a*b denotes the greatest common divisor of a and b, then ((12*16)*(18*24)) = ?
(A) 24
(B) 12
(C) 6
(D) 4
(E) 2
(A) 24
(B) 12
(C) 6
(D) 4
(E) 2
02 Dec 2014, 08:17
Kudos
Bookmarks
omkar05
The greatest common divisor of 12 and 16 is 4. Hence 12*16 = 4 (note that * here denotes the function not multiplication).
The greatest common divisor of 18 and 24 is 6. Hence 18*24 = 6.
Hence ((12*16)*(18*24)) = 4*6.
The greatest common divisor of 4 and 6 is 2.
Answer; E.
02 Dec 2014, 22:12
Kudos
Bookmarks
GCD of 12,16 = 4
GCD of 18,24 = 6
GCD of 4,6 = 2
((12*16)*(18*24)) = (4 * 6) = 2
Answer = E
GCD of 18,24 = 6
GCD of 4,6 = 2
((12*16)*(18*24)) = (4 * 6) = 2
Answer = E
