Number Theory Multiple Choice Questions and Answers. We covered all the MCQs on number theory with answers in this post so that you can practice well for your exams for free.
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Number Theory Multiple Choice Practice Bits for School Students
Which of the following is not a perfect number?
1. 6
2. 28
3. 120
4. 496
Option 3 – 120
Unique factorisation theorem from the following, is
1. A number for which the sum of all its factors is twice the number itself is called a perfect number
2. Every natural number greater than 1 can be divid ed into a prime number or a composite number
3. Every number greater than 1 can be expressed as the product of primes in a unique way except for the order in which the factors appear
4. Set of prime numbers is infinite
Option 3 – Every number greater than 1 can be expressed as the product of primes in a unique way except for the order in which the factors appear
The no. of digits that the largest prime number so far found contains, is :
1. 2,27,823
2. 2,27,832
3. 2,72,832
4. 2,72,823
Option 2 – 2,27,832
The no. of digits that the largest perfect number discovered so far contains, is :
1. 4,55,661
2. 4,55,662*
3. 4,55,663
4. 4,55,665
Option 3 – 4,55,663
The difference of an even number and an odd number, is
1. an odd number
2. an even number
3. a prime number
4. an even composite number
Option 1 – an odd number
The sum of an even number and odd an number is :
1. an even number
2. an odd number
3. a composite number
4. a prime number
Option 2 – an odd number
The product of any two odd numbers is :
1. an even number
2. an odd number
3. a composite number
4. a prime number
Option 2 – an odd number
3 x 5 x 7 x 9x 11 × 13 × 15 is ……
1. an even number
2. an odd number
3. a composite number
4. a prime number
Option 2 – an odd number
1 × 2 × 3 × 4 x 5 x 6 x 7 x 8 x 9 is :
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 2 – an even number
10,000 – 3452 is :
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 2 – an even number
1,00,000 + 452 is :
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 2 – an even number
576 + 572 + 64 + 37 is
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 1 – an odd number
The set of natural numbers is divided into …… sets :
1. three overlapping sets
2. four disjoint
3. three disjoint
4. two disjoint
Option 4 – two disjoint
A true statement among the following, is
1. All even numbers are prime numbers
2. All composite numbers are even numbers
3. All odd numbers are composite numbers
4. 2 is an even prime numbers
Option 4 – 2 is an even prime numbers
The integers which are exactly divisible by 2 are called
1. odd numbers
2. even numbers
3. composite numbers
4. prime numbers
Option 2 – even numbers
The general form of an even number, is :
1. 2n
2. 2n+1
3. 2n-1
4. 2n+2
Option 1 – 2n
The numbers which are not divisible by 2 are called :
1. even numbers
2. composite numbers
3. odd numbers
4. prime numbers
Option 3 – odd numbers
The general form of an odd numbers, is
1. 2n+1
2. 2n
3. 2n-2.
4. 2n+2
Option 1 – 2n+1
The sum or difference of any two even numbers is :
1. an odd number
2. a composite number
3. an even number
4. a prime number
Option 3 – an even number
The product of two odd numbers is :
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 1 – an odd number
When integer is divided by 2, the remainder is
1. 2
2. 1
3. 0
4. either 0 or 1
Option 4 – either 0 or 1
The sum of any even number and an odd number is
1. an odd number
2. an even number
3. a composite number
4. a prime number
Option 1 – an odd number
We covered all the Number Theory Multiple Choice Questions and Answers in this post above so that you can practice well for the exam.
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