Prime, Composite and Twin Numbers

1.	Factors of a number
2.	Finidng factors
3.	Multiples of a number
4.	Prime number
5.	Composite number
6.	Eratosthenes sieve method
7.	Perfect number, co-prime number and twin primes

1.	Select the correct answer Difficulty: easy	2
2.	Calculate the first five multiples Difficulty: easy	2
3.	Match column I items to column II items Difficulty: easy	5
4.	Write down all required multiples Difficulty: medium	3
5.	Express the number as sum of odd primes Difficulty: medium	5
6.	Check the number is prime or not Difficulty: hard	4
7.	Find the required primes Difficulty: hard	6
8.	State whether the declaration is true or false Difficulty: hard	4

1.

Training test

Difficulty: medium

2

1.

Methodical recommendation

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