• 5 Day FREE Trial
Study Smarter, Not Harder

Available with Beat the GMAT members only code

• Free Practice Test & Review
How would you score if you took the GMAT

Available with Beat the GMAT members only code

• Magoosh
Study with Magoosh GMAT prep

Available with Beat the GMAT members only code

• 1 Hour Free
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• Free Trial & Practice Exam
BEAT THE GMAT EXCLUSIVE

Available with Beat the GMAT members only code

• 5-Day Free Trial
5-day free, full-access trial TTP Quant

Available with Beat the GMAT members only code

• Award-winning private GMAT tutoring
Register now and save up to \$200

Available with Beat the GMAT members only code

• Most awarded test prep in the world
Now free for 30 days

Available with Beat the GMAT members only code

• Get 300+ Practice Questions

Available with Beat the GMAT members only code

• Free Veritas GMAT Class
Experience Lesson 1 Live Free

Available with Beat the GMAT members only code

## prep question

This topic has 1 member reply
jamesk486 Master | Next Rank: 500 Posts
Joined
28 Mar 2007
Posted:
141 messages
Followed by:
1 members
2

#### prep question

Thu Apr 19, 2007 12:14 am
A, b and c are 3 digit positive integers, where a=b+c. Is the hundreds digit of A equal to the sum of the hundreds digit of b and the hundredes digit of c?
(1) the tens digit of A is equal to the sum of the tens digit of b and the tens digit of c
(2) the units digit of a is equal to the sum of the units digit of b and the units digit of c.

For (1), b=542, c=351, so a= 893
but then the tens digits of b and c can both be 5 so a can't be a 3 digit ineger
(2) is insufficient==> b=545, c=455, so then a would be 1000

but why is the answer A??

Prasanna Master | Next Rank: 500 Posts
Joined
26 Feb 2007
Posted:
418 messages
24
Thu Apr 19, 2007 8:26 pm
jamesk486 wrote:
A, b and c are 3 digit positive integers, where a=b+c. Is the hundreds digit of A equal to the sum of the hundreds digit of b and the hundredes digit of c?
(1) the tens digit of A is equal to the sum of the tens digit of b and the tens digit of c
(2) the units digit of a is equal to the sum of the units digit of b and the units digit of c.

For (1), b=542, c=351, so a= 893
but then the tens digits of b and c can both be 5 so a can't be a 3 digit ineger
(2) is insufficient==> b=545, c=455, so then a would be 1000

but why is the answer A??
Hi

When you assign the value of 5 to tens digit in both b and c, condition(1) is not satisified. In this case tens digit in A would be zero. Hence we cannot check for that set of values. The answer would be A.

The question states that a, b and c are all three digit positive integers and condition (1) is sufficient to answer the question.

### Best Conversation Starters

1 lheiannie07 108 topics
2 Roland2rule 63 topics
3 ardz24 63 topics
4 LUANDATO 50 topics
5 AAPL 42 topics
See More Top Beat The GMAT Members...

### Most Active Experts

1 GMATGuruNY

The Princeton Review Teacher

152 posts
2 Jeff@TargetTestPrep

Target Test Prep

106 posts
3 Rich.C@EMPOWERgma...

EMPOWERgmat

104 posts
4 Scott@TargetTestPrep

Target Test Prep

96 posts
5 Max@Math Revolution

Math Revolution

87 posts
See More Top Beat The GMAT Experts