Question 1: Answer the following questions:
Question 2: Write two prime numbers whose difference is 1.
Question 3: Write all composite numbers between 90 and 100.
Question 4: Which of the following pairs are coprime?
Question 5: Is it possible that a number is divisible by 8 but not divisible by 4?
Question 6: Which of these numbers are divisible by 3 or 4 or both?
Question 7: Test the divisibility of the following numbers by 3:
Question 8: Test the divisibility of the following numbers by 5:
Question 9: Test the divisibility of the following numbers by 9:
Question 10: Test the divisibility of the following numbers by 11:
Question 11: In each of the following numbers, replace * by the smallest number to make it divisible by 9:
Question 12: Test the divisibility of the following numbers by 4:
Question 13: Find the H.C.F. of:
Question 14: Find all the common factors of:
Question 15: Find the L.C.M. of the following numbers:
Question 16: Write in the product form:
Question 17: Fill the vacant circles in each of the following factor trees.
Question 18: Find the HCF of the following numbers by long division method:
Question 19: Find the L.C.M. by prime factorisation method:
Question 20: Answer the following questions:
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