Digits

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MBA.Aspirant: Master | Next Rank: 500 Posts; Posts: 401; Joined: Tue May 24, 2011 1:14 amFollowed by: 5 members; Thanked: 37 times

by MBA.Aspirant » Thu Jun 30, 2011 8:36 pm

If x and y are tens digit and units digit respectively of the product 725, 278 x 67066
what is the value of x + y?

A. 12
B. 10
C. 8
D. 6
E. 4

Thanks

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Source: Beat The GMAT — Problem Solving | Thu Jun 30, 2011 8:36 pm

amit2k9: Master | Next Rank: 500 Posts; Posts: 461; Joined: Tue May 10, 2011 9:09 amFollowed by: 3 members; Location: pune; Thanked: 36 times

by amit2k9 » Thu Jun 30, 2011 8:56 pm

last two digits will be product of last two digits of individual numbers
here it is 78 and 66
thus 48 is the number

x+y = 12

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MBA.Aspirant: Master | Next Rank: 500 Posts; Posts: 401; Joined: Tue May 24, 2011 1:14 amFollowed by: 5 members; Thanked: 37 times

by MBA.Aspirant » Thu Jun 30, 2011 9:05 pm

I don't know what's with me and not reading qs right these days. I thought this is 725 x 278 x 67066 and was getting 0 for the units

Anyway thanks for explaining

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