gmatter0913 wrote:

My doubt is as follows:

Am I correct in saying that rounding off can be applied only once and not redundantly.

I mean if I have to round off 3.4346 to two decimals then it would be 3.435 and then 3.44. (I am applying round off successively) Is this correct?

So, if I have to cut 3.4346 to hundredths, will it be 3.44 or will it be 3.43 ?

Problem:

A digit 8.abc when rounded to tenths is 8.2, what is the value of the digit 8.abc if a=1?

Here, a is given as 1. Hence the digit will be 8.1bc

In this case, can the digit "b" be 4 or it has to be only among 5,6,7,8 and 9?

My doubt is can the digit be 8.146, wherein 8.146 is rounded first to 8.15 and then 8.15 is rounded to 8.2 ?

When rounding we should only take into the account the first dropped digit. Thus 8.146 rounded to the nearest tenth is 8.1, since the dropped 4 is less than 5.

Rounding rulesRounding is simplifying a number to a certain place value. To round the decimal drop the extra decimal places, and if the first dropped digit is 5 or greater, round up the last digit that you keep. If the first dropped digit is 4 or smaller, round down (keep the same) the last digit that you keep.Example:

5.3485 rounded to the nearest tenth = 5.3, since the dropped 4 is less than 5.

5.3485 rounded to the nearest hundredth = 5.35, since the dropped 8 is greater than 5.

5.3485 rounded to the nearest thousandth = 5.349, since the dropped 5 is equal to 5.

Hope it helps.

_________________

New to the Math Forum?

Please read this: All You Need for Quant | PLEASE READ AND FOLLOW: 12 Rules for Posting!!!

Resources:

GMAT Math Book | Triangles | Polygons | Coordinate Geometry | Factorials | Circles | Number Theory | Remainders; 8. Overlapping Sets | PDF of Math Book; 10. Remainders | GMAT Prep Software Analysis | SEVEN SAMURAI OF 2012 (BEST DISCUSSIONS) | Tricky questions from previous years.

Collection of Questions:

PS: 1. Tough and Tricky questions; 2. Hard questions; 3. Hard questions part 2; 4. Standard deviation; 5. Tough Problem Solving Questions With Solutions; 6. Probability and Combinations Questions With Solutions; 7 Tough and tricky exponents and roots questions; 8 12 Easy Pieces (or not?); 9 Bakers' Dozen; 10 Algebra set. ,11 Mixed Questions, 12 Fresh Meat

DS: 1. DS tough questions; 2. DS tough questions part 2; 3. DS tough questions part 3; 4. DS Standard deviation; 5. Inequalities; 6. 700+ GMAT Data Sufficiency Questions With Explanations; 7 Tough and tricky exponents and roots questions; 8 The Discreet Charm of the DS; 9 Devil's Dozen!!!; 10 Number Properties set., 11 New DS set.

What are GMAT Club Tests?

Extra-hard Quant Tests with Brilliant Analytics