Worksheet: HCF & LCM Notes | EduRev

Mathematics for Class 5

Class 5 : Worksheet: HCF & LCM Notes | EduRev

The document Worksheet: HCF & LCM Notes | EduRev is a part of the Class 5 Course Mathematics for Class 5.
All you need of Class 5 at this link: Class 5

Question 1: Answer the following questions:

  • Write the first 3 multiples of 21.
  • Which of the following numbers are composite?
    2, 7, 15, 27, 29, 37, 53, 69, 87.

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?

  • 18 and 30
  • 35 and 52

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?

  • 87,342
  • 23,148

Question 7: Test the divisibility of the following numbers by 3:

  • 90,82,746
  • 70,335

Question 8: Test the divisibility of the following numbers by 5:

  • 2,01,234
  • 4,37,839

Question 9: Test the divisibility of the following numbers by 9:

  • 3,478
  • 8,74,512

Question 10: Test the divisibility of the following numbers by 11:

  • 1,00,01,001
  • 5,335

Question 11: In each of the following numbers, replace * by the smallest number to make it divisible by 9:

  • 66784 *
  • 5321 * 43

Question 12: Test the divisibility of the following numbers by 4:

  • 7,314
  • 9,31,105

Question 13: Find the H.C.F. of:

  • 14 and 35
  • 15 and 35
  • 30, 75 and 90
  • 8 and 40

Question 14: Find all the common factors of:

  • 16 and 40
  • 18 and 45
  • 12 and 15
  • 52 and 117

Question 15: Find the L.C.M. of the following numbers:

  • 5 and 8
  • 4 and 9
  • 12 and 15
  • 26 and 15
  • 8, 10 and 12
  • 6 and 10
  • 9 and 11

Question 16: Write in the product form:

  • 24 × 52 × 32
  • 65 × 26 × 32
  • 67 × 105
  • 48

Question 17: Fill the vacant circles in each of the following factor trees.
Worksheet: HCF & LCM Notes | EduRev

Question 18: Find the HCF of the following numbers by long division method:

  • 40, 75
  • 24, 64
  • 27, 45
  • 81, 117
  • 18, 45, 36
  • 54, 96, 120
  • 70, 98, 154

Question 19: Find the L.C.M. by prime factorisation method:

  • 15 and 20
  • 24 and 36
  • 42 and 91
  • 50 and 105
  • 4, 36 and 52
  • 10, 35 and 40
  • 12 and 18

Question 20: Answer the following questions:

  • The HCF of two numbers is 19 and their LCM is 228. If one of the numbers is 57, find the other.
  • The product of two numbers is 25,024 and their H.C.F. is 8. Find their L.C.M.
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