There are approximately 2.2 pounds in one kilogram GMAT Problem Solving

Question: There are approximately 2.2 pounds in one kilogram. To the nearest eighteenth, how many eighteenths of a kilogram are there in one pound?

  1. 7
  2. 8
  3. 9
  4. 39
  5. 40

Approach Solution (1)

As it is known that 2.2 pounds = 1 kg
Therefore, 1 pound = 1/2.2 kg = 10/22 kg
We have to find how many 1/18 kg are there in 10/22 
So, the final answer will be as = (18 * 10)/22 = 90/11 = 8.2
This can be approximately taken as 8

Correct option: B

Approach Solution (2)

Given that:
1kg = 2.2 lbs
1 lbs = 1/2.2 kgs
1/2.2 can also be written as 10/22
We need to find 1/18 of kgs in lbs
Therefore, it will be calculated as:
x/18 = 10/22
x = 18*10/22
x = 8

Correct option: B

Approach Solution (3)

Firstly, set up a proportion to find the number of kilograms in 1 pound.
2.2 pounds/1 kilogram = 1 pound/x kilograms
2.2x = 1
x = 1/2.2
Thus, 1 pound is 1/2.2 kilograms, or 0.454545 kilograms.
Now, we set up another proportion to convert the equivalent of 0.454545 kilograms to eighteenths (of a kilogram).
0.454545 = y/18
y ≈ 8

Correct option: B

“There are approximately 2.2 pounds in one kilogram. To the nearest eighteenth, how many eighteenths of a kilogram are there in one pound?”- is a topic of the  GMAT Quantitative reasoning section of GMAT. This question has been taken from the book “GMAT Official Guide Quantitative Review”. To solve GMAT Problem Solving questions a student must have knowledge about a good amount of qualitative skills. The GMAT Quant topic in the problem-solving part requires calculative mathematical problems that should be solved with proper mathematical knowledge.

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