Question

व्हाट इज द लार्जेस्ट टू डिजिट प्राइम नंबर 96,97,98,99​

Answer 1

Question :- what is largest two digit prime number ?

A) 96

B) 97

C) 98

D) 99

Solution :-

We know that,

• A number which has only two factors 1 and itself are prime numbers .
• 2 is first and only even number that is a prime number .

so, checking given options we get,

A) 96

→ 96 = Even number so divisible by 2 .

so, 96 has more than 2 factors . Then it is not a prime number .

B) 97

→ 97 = 1 * 97

since 97 has only two factors 1 and itself . It is a prime number .

C) 98

→ 98 = Even number => Not a prime .

D) 99

→ 99 = 3 * 3 * 11 => More than 2 factors => Not a prime .

therefore, we can conclude that, largest two digit prime number is 97 (B) . .

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Answer 2

Given :  2 digit numbers

To Find : Largest two digits prime number

Solution:

Prime numbers are the numbers which has two distinct factors one and number itself.

Start checking backward  from largest 2 digit number and find which is prime number

Largest 2 digit number  is 99

99 = 1 * 99  = 3 * 33  = 9 * 11

Hence 6 Factors , not a prime number

Next is 98

98  = 1 * 98 = 2 * 49  =  7 * 14  

Hence 6 Factors , not a prime number

Next is 97

97 = 1 * 97   a prime number

Hence 97 is largest 2 digit prime number

97 is largest 2 digit prime number

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