1. ���������������������� ����Ryan International school Amritsar<br />������������������������������������������� Worksheet<br />Class-v<br />Subject :Maths������������������������������������������������������� Date:25.08.11<br />�<br />1.� Find the LCM of 12,15,20,27 by division method.<br />2.� Find the HCF of 144 and 198 by prime factorization method.<br />3.� Test the divisibility of the following numbers by 3<br />�� a) 10038<br />� b) 67425<br />4. Give an example of a number which is divisibility by 2 but not by 8.<br />5. Which of the following are prime numbers?<br />137,151,161,163,103,133,179,167,203<br />6. What are composite numbers? Can a composite number be odd? If yes write the smallest odd composite number.<br />7.� Write all prime numbers between 40 and 80.<br />8. In each of the following numbers replace * by the smallest number to make it divisible by 9.<br />a) 65*5�������������������������������� b)� 91*67<br />9. List all the composite numbers which are more than 78 but less than 90.<br />10. Find the least number which is divisible by 15,20,24,32 and 36.<br />11. Find the LCM of 24,36 and 40 by the prime factorization method.<br />12. Find the HCF of 513 and 783 by division method.<br /> <br />