Teaching BSSTET Special Educator (Paper 1 & 2) Mock Test 2024 Quantitative Aptitude Number System Prime Numbers
Which of the following options is correct ?
1
Any number of the form 6k + 1 or 6k - 1 where k is an positive integer is a prime number.
2
1 is a prime number.
3
A prime number greater than 3 is always of the form 6k + 1 or 6k - 1 where k is an positive integer.
4
The collection of prime numbers and composite numbers is the set of Natural numbers.