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18 Apr 2016, 08:20
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B
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Difficulty:
15%
(low)
Question Stats:
76% (00:45) correct
24%
(00:34)
wrong
based on 81
sessions
History
Date
Time
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Not Attempted Yet
What is the units digit of the product of the two positive integers x and y?
(1) x = 3!
(2) y = 6!
(1) x = 3!
(2) y = 6!
Pure algebraic questions like this one are no longer part of the GMAT Data Sufficiency syllabus.
For relevant Data Sufficiency questions, please check the Data Sufficiency forum:
Data Sufficiency Forum
Data Sufficiency Forum
18 Apr 2016, 20:47
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(1) x = 3!
x= 3*2*1 = 6
Not sufficient
(2) y = 6!
y= 6*5*4*3*2*1
= 720
Since , units digit of y is 0 . Therefore , units digit of product xy will be 0 always.
Sufficient
Answer B
x= 3*2*1 = 6
Not sufficient
(2) y = 6!
y= 6*5*4*3*2*1
= 720
Since , units digit of y is 0 . Therefore , units digit of product xy will be 0 always.
Sufficient
Answer B
19 Apr 2016, 02:00
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B.
Statement 1 gives us x=6 and nothing about y. So, insufficient.
Statement 2 gives us y=720. Irrespective of the value of x, unit digit will always be zero. Sufficient.
Statement 1 gives us x=6 and nothing about y. So, insufficient.
Statement 2 gives us y=720. Irrespective of the value of x, unit digit will always be zero. Sufficient.
