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Missing digits

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Senior | Next Rank: 100 Posts
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by aloneontheedge » Sun Jul 18, 2010 8:39 am
mattocks wrote:7x
xy
xx
__

117

The above represents addition with x and y representing certain digits. What is the value of y?

A. 1
B. 2
C. 3
D. 4
E. 5
Y = 3
Approach 2x +y = 7 plug values from the choices and check
start with x = 1,y =5
x= 2 y =3 This satisfies.
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by singhpreet1 » Sun Jul 18, 2010 8:40 am
mattocks wrote:7x
xy
xx
__

117

The above represents addition with x and y representing certain digits. What is the value of y?

A. 1
B. 2
C. 3
D. 4
E. 5

lets assume x is 2, therefore 7x= 72, lets assume y is 3, xy=23, then xx=22,

therefore, 72+23+22=117.

i did by trial and error method.

what is the OA?

Preet
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