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प्रश्न
State if the following is a prime number?
397
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.
397 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
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357986
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438750
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137269
In the following number, replace * by the smallest number to make it divisible by 9:
6702*
In the following number, replace * by the smallest number to make it divisible by 11:
26*5
In the following number, replace * by the smallest number to make it divisible by 11:
1723*4
Test the divisibility of 10001001 by 3.
Give an example of a number which is divisible by both 3 and 6 but not by 18.
Write (T) for true and (F) for false against the following statement:
If a number is divisible by both 9 and 10, it must be divisible by 90.
Which of the following is a prime number?
