Mathematics · Quantitative Aptitude

Number Theory

438 Questions

Number theory explores the properties and relationships of integers, focusing heavily on prime and composite numbers. Key areas include identifying prime numbers, understanding co primes, and exploring mathematical conjectures like Goldbach's. These questions are a core component of quantitative aptitude sections in banking and government exams.

Prime number identificationCo prime propertiesGoldbach conjectureOdd and even numbersDivisibility rules

Number Theory Questions

Multiple choice

23 is a _____.

  1. prime number

  2. composite number

  3. negative number

  4. surd
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

23 is a prime number as it has only 2 factors 1 and 23 itself

Multiple choice

Which of the following statements is true about a prime number?

  1. A prime number can be a negative number.

  2. A prime number has more than 2 factors.

  3. A prime number has two factors, the number itself and any other odd number

  4. A prime number has two factors, the number itself and 1
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The true statement here is a prime number has only 2 factors 1 and the number itself.