All Teas are Served Hot or Iced. Most Coffees are Served Hot or Iced and Always Contain Caffeine.

Topic: All teas are served hot or iced. Most coffees are served hot or iced and always contain caffeine. Most teas and some coffees include guarana, but most teas don’t include caffeine. Taurine is found in most teas, but never in a beverage that includes milk or caffeine. Most coffees and teas include milk.

IF the statements are true, all the following must be true EXCEPT

1. Some teas include taurine but not caffeine
2. Some teas or some coffees are served iced with milk.
3. Some teas include guarana but not caffeine.
4. Some teas don’t include caffeine but include milk.
5. No coffee includes taurine.

“All Teas are Served Hot or Iced. Most Coffees are Served Hot or Iced and Always Contain Caffeine.” – this is a GMAT Critical question. In this particular topic, candidates need to choose the option that best suits the passage. GMAT critical reasoning tests the logical and analytical skills of the candidates. Critical reasoning in GMAT requires candidates to find the strengths and weaknesses of the argument, or find the logical flaw in the argument.  This particular GMAT Critical Reasoning topic has been taken from the book ‘501 Quantitative Comparison Questions’. The GMAT CR section contains 10 -13 GMAT critical reasoning questions out of 36 GMAT verbal questions.

Answer: B
Explanation: As per the question we must validate all the statement choices one by one to reach the correct one.

The problem statement asks us to find the option that is not true.

Now let us check each options:

1. Some teas include taurine but not caffeine - This is true since most of the teas have taurine but taurine is never present in a beverage that contains caffeine. The statement “Taurine is found in most teas, but never in a beverage that includes milk or caffeine” proves that. 
2. Some teas or some coffees are served iced with milk. - This is false. It says that some teas are served iced with milk. However, from the passage we know that more than most of teas and coffees include milk. We only know that all of the teas are served hot or iced but we don't know the proportion. It maybe 55% are served hot and 45% are iced and those iced may or may not have milk. And the same applies for the coffes. We only know that more than 50% of them are served hot or ice but we don't know the proportion of hot vs. iced. So this is the right answer choice.
3. Some teas include guarana but not caffeine - This is also true since most teas include guarana and most teas don't include caffeine. This means that at least some some include guarana but not caffeine. We can be sure of this because two sets having more than 50% of the sample have to overlap at some point.
4. Some teas don’t include caffeine but include milk - This is also true since most teas don't include caffeine and most teas include milk. This means that at least some of them don't include caffeine but contain milk. This can also be secured by overlapping two sets which include more than 50% of a sample.
5. No coffee includes taurine - This is true since coffees always contain caffeine and taurine is never found in a beverage that includes milk or caffeine. The statement “Taurine is found in most teas, but never in a beverage that includes milk or caffeine” proves the point.

Suggested GMAT Critical Reasoning Questions

• Turtles, like Other Reptiles, can Endure Long Fasts, in their Ability to Survive on Weekly
• A Diet High in Saturated Fats Increases a Person's Risk of Developing Heart Disease
• Carol is Shorter Than Juan, But She is Taller than Ed. Sandra is Shorter than Juan, and She is Shorter than Ed
• Ethicist: It Would be a Mistake to Say that Just Because Someone is Inclined to do Otherwise
• A new medication for migraine seems effective, but there is concern that the medication might exacerbate heart disease.
• If the books have been cataloged last week, why haven’t they been placed on the shelf?
• The pioneers of the teaching of science imagined that its introduction into education would remove the conventionality, artificiality, and backward-lookingness
• Because no employee wants to be associated with bad news in the eyes of a superior
• According to a survey of graduating medical students conducted by Association of American Medical College
• But man is not destined to vanish. He can be killed, but he cannot be destroyed, because his soul is deathless and his spirit is irrepressible.
• Josh has twenty years of typing experience behind him
• A major network news organization experienced a drop in viewership in the week
• New Observations about the Age of Some Globular Clusters in Our Milky Way Galaxy
• French cuisine is highly regarded all over the world.
• Roland: The alarming fact is that 90 percent of the people in this country now report that they know someone who is unemployed.
• TOMMY: That telephone always rings when I am in the shower and can’t hear it.
• A major network news organization experienced a drop in viewership in the week
• Experienced pilots often have more trouble than novice pilots in learning to fly
• It is Difficult to Keep Deep Wounds Free of Bacteria.
• Jane drinks 4 Cups of Coffee Every Day.