Lesson: Challenging Problem Solving - 13t01

Advanced Number Properties: Know The Rules

[Page 13 of 37]

Picking Numbers works well on many Number Properties questions, but sometimes it's necessary to know Number Property rules in order to solve a problem. At other times, familiarity with the rules will help get you to the correct answer more efficiently. For the following Roman Numeral question, we will focus on the Number Property rules that are being tested. Review the question and then proceed to the task below.

If the sum of prime numbers x and y is an odd number, which of the following CANNOT be true?

I. y2 is odd
II. x – y is odd
III. is an integer

None
I only
III only
I and II
II and III
This question stem suggests that two Number Properties concepts will be central to solving this problem. What are they?

1:

2:

Our question stem explicitly mentions two Number Properties concepts we must consider in answering this question—odd/even addition rules, and the definition of a prime number. If we can recall the basics facts regarding odd, even, and prime numbers, then we can get through this question easily.
Back Next

Next to display next topic in the chapter.

Video Lessons and 10 Fully Explained Grand Tests

Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.

Quantitative Aptitude Reasoning English General Knowledge Picture Patterns
Current Menu

Test Prep New

Practice MCQs

Admission Tests

Section Lessons

US Degrees

Pak Universities

Employment

ISSB Selection

ISSB Procedures

Test Preparation

Non-Verbal Tests

Thematic Tests

GTO Tasks

Pak Air Force

Pak Army

Pak Navy

Schools & Colleges

Expressions

Essays

Education News

Scholarships & Study

More for You
MCQ with question Explanations Scholarships and Financial Aid

Problem Solving

Lessons with practice question on math section of the test

Arithmetic

Lessons on Basic to Advance Arithmetic with practice questions

GRE Mathematics

Complete review of GRE Mathematics with practice questions

All in this Category

You may be interested in

Colleges in cities of Punjab

Comprehensive lists of colleges in ...

Colleges in karachi

A comprehensive list of major colle ...

How to Develop Your Personality?

Learn methods to develop your perso ...

English Grammar

Learn English Grammar with lessons ...

Pakistan Army Selection and Recruitment Tests

All about Pakistan Army Selection a ...

PPSC - Research Officer Exam

Learn about the exam of PPSC - Rese ...

UET - BSc Engineering

University of Engineering and Techn ...

Universities in Karachi

A comprehensive list of major unive ...

About us

EntryTest.com is a test preparation service for students seeking successful career.

About Disclaimer

Quick Test Prep

NUST NET IBA Karachi SAT LUMS LCAT LSE

 

NTS GAT NTS NAT GMAT GRE ACT

Study Abroad

Education Abroad Business Schools MS in USA