Bunuel wrote:
Jamboree and GMAT Club Contest Starts
QUESTION #9:M and N are positive numbers. Is N > 0.06?
(1) When M + N is rounded to tenths digit the value is M
(2) N > 0.04
Check conditions below:
For the following two weekends we'll be publishing 4 FRESH math questions and 4 FRESH verbal questions per weekend.
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JAMBOBREE OFFICIAL SOLUTION:The rounding concept is that when have to round up the number to any particular position we check just the next right hand digit of the number , if the next right hand number is less than 5 then we keep the digit in the position which we need to round of same but if the next right hand number is greater than or equal to 5 then we increase by 1 the digit in the position which we need to round of.
Statement 1 Let us consider M = ABC. DEF and N = rst.uvs
Where A,B,C,D,E,F,r,s,t,u,v,and s are the digits of numbers M and N
Now it is given that When M + N is rounded to tenths digit the value is M
The above will only be true if r=s=t=u =0 .
also E+ v < 5 --> v < 5
hence N < 0.5 --> N < 0.6
hence we have a definite No as the definite answer
statement 1 is sufficient.
Statement 2Now N > 0.04 does not answer the question as N can be either 0.5 or 0.8
Answer: A.
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