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प्रश्न
State if the following is a prime number?
331
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उत्तर
A number between 100 and 200 is a prime number if it is not divisible by any prime number less than 15.
Similarly, a number between 200 and 300 is a prime number if it is not divisible by any prime number less than 20.
331 is a prime number because it is not divisible by 2, 3, 5, 7, 11, 13, 17, and 19.
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संबंधित प्रश्न
Test the divisibility of the following numbers by 5:
23590
Test the divisibility of the following numbers by 5:
723405
Test the divisibility of the following numbers by 8:
2138
Test the divisibility of the following numbers by 9:
326999
Test the divisibility of the following number by 10:
63215
In the following number, replace * by the smallest number to make it divisible by 9:
2*135
In the following number, replace * by the smallest number to make it divisible by 11:
1723*4
Give an example of a number which is divisible by 4 but not by 8.
Write (T) for true and (F) for false against the following statement:
The sum of two consecutive odd numbers is always divisible by 4.
Write (T) for true and (F) for false against the following statement:
If a number divides two numbers exactly, it must divide their sum exactly.
