Question

29
We know that 15 x 15 > 200.
So, we adopt the following rule:
TO FIND PRIME NUMBERS BETWEEN 100 AND 200
Examine whether the given number is divisible by any prime number less than 15.
If yes then it is not prime; otherwise it is prime.
(i) Test the divisibility of 117 by each one of the prime numbers 2, 3, 5, 7, 11, 13,
taking one by one. We find that 117 is divisible by 13. So, 117 is not a
(ii) Test the divisibility of 139 by each one of the prime numbers 2, 3, 5, 7, 11, 13.
We find that 139 is divisible by none of them. So, 139 is a prime number.
Factors and Multiples
Rule
EXAMPLE
(ii) 139
(iii) 193
Solution
prime number.
(iii) Test the divisibility of 193 by each one of the prime numbers 2, 3, 5, 7, 11, 13.
We find that 193 is divisible by none of them.
So, 193 is a prime number.
Which of the following are prime numbers?
(i) 117
D
TO FIND PRIME NUMBERS BETWEEN 100 AND 400
know that 20 x 20 = 400.
Examine whether the given number is divisible by any prime number less than
20. If yes then it is not prime; otherwise it is prime.
Which of the following is a prime number?
PLE​

Answer 1

Answer:

please write properly

Answer 2

please write properly