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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