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Test: Quantitative Comparison- 2 - GRE MCQ


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15 Questions MCQ Test Section-wise Tests for GRE - Test: Quantitative Comparison- 2

Test: Quantitative Comparison- 2 for GRE 2024 is part of Section-wise Tests for GRE preparation. The Test: Quantitative Comparison- 2 questions and answers have been prepared according to the GRE exam syllabus.The Test: Quantitative Comparison- 2 MCQs are made for GRE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Quantitative Comparison- 2 below.
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Test: Quantitative Comparison- 2 - Question 1

Test: Quantitative Comparison- 2 - Question 2

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P and Q take 4 hours to complete a task. P, Q, and R take 2 hours to complete the task.

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Test: Quantitative Comparison- 2 - Question 8

Detailed Solution for Test: Quantitative Comparison- 2 - Question 8

Column A: The task is to find out how many three-digit even numbers can be made using all the prime numbers less than 10 without repetition.

Column B: The task is to find out how many two-digit numbers can be made using all the prime numbers less than 7 without repetition.

Let's start by identifying the prime numbers less than 10 for Column A: they are 2, 3, 5, and 7. Since we're looking to form even numbers and even numbers must end with an even digit, 2 must be the last digit. For the first two digits, we can use 3, 5, and 7 in any order, which gives us 3! (3 factorial) possibilities.

For Column B, we identify the prime numbers less than 7: they are 2, 3, and 5. Since we are forming two-digit numbers without repetition, we can choose any of the three digits for the first place and any of the remaining two digits for the second place.

Let's calculate the exact numbers for both columns.

The calculations show that both Column A and Column B have the same number of possibilities, which is 6. Therefore, the correct answer is:

Option C: Both are equal. ​​

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