Thursday, 16 January 2025

Class -4/ Math - Playing with number - 2

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             MY DIGITAL GURUKUL

                             Class - IV

              Math (playing with number) 

F. M.- 20                                          Time - 1h

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1. Choose the correct option.   [5]

   i) The LCM of 10 and 20 is 

     a) 10           b) 20            c) 12                d) 30

  ii)  The factor not there in the prime factorisation of 150

     a) 10            b) 2             c) 3                  d)  5

  iii)  ___ is the prime number

     a)  16           b) 17            c) 18              d) 81

  iv)  The greatest factor of a number is the number 81.

      a)  3            b) 9              c) 27              d) 81

  v)  ___ is the smallest odd prime no.

      a) 2             b) 3              c) 5                d) 7

2.  With out actual division, show that 1719360 

     is divisible by which number.       [3]

3. Show that i) 3 is a factor of 42             [2 X 2 = 4]

                     ii) 72 is a multiple of 5

4. Find the HCF by common division method.  [3]

              22, 32, 56

5. Find HCF by listing method                       [3]

              24, 36, 33

6. Complete the following    [2]

    ____,  16,  ____,  _____,  40, _____

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