Which of these numbers is prime? 10,13,15,18
Which of these numbers is prime?
10,13,15,18
For a number to be prime it must only have factors of one and itself. 10 has factors 1, 2, 5, 10. 15 has factors 1, 3, 5, 15. 18 has factors 1, 2, 3, 6, 9, 18. The only factors of 13 are 1 and 13. As such it is prime.
For a number to be prime it must only have factors of one and itself.
10 has factors 1, 2, 5, 10.
15 has factors 1, 3, 5, 15.
18 has factors 1, 2, 3, 6, 9, 18.
The only factors of 13 are 1 and 13. As such it is prime.
504 MCQ for effective preparation of the test of Number System of Mathematics section.
Read the MCQ statement: Which of these numbers is prime? 10,13,15,18, keenly and apply the method you have learn through the video lessons for Number System to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 480-9212.