Advertisements
Advertisements
Question
State if the following is a prime number?
397
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Test the divisibility of the following number by 4:
35056
Test the divisibility of the following numbers by 5:
124684
Test the divisibility of the following numbers by 7:
14126
Test the divisibility of the following numbers by 7:
25368
Test the divisibility of the following numbers by 8:
2138
Test the divisibility of the following number by 10:
5790
In the following number, replace * by the smallest number to make it divisible by 3:
6*1054
In the following number, replace * by the smallest number to make it divisible by 11:
467*91
Test the divisibility of 12030624 by 8.
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.
