Class - 5
Time-30min MATH (playing with number) F.M. - 20
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1. Choose the correct option. (5)
a) Determine which is odd number.
i) 944 ii) 211 iii) 855
b) ___ is the only even prime number.
i) 1 ii) 2 iii) 4
c) Two prime number with a difference of 2 are called _______ prime.
i) Co-prime ii) Twin prime iii) None of these
d) 86076 is divisible by
i) 3 ii) 5 iii) 7
e) Product of tow number is 96. If their HCF is 4, find their LCM ___
i) 22 ii) 23 iii) 24
2. Find HCF by the listing method . (1 1/2)
63 and 36
3. Find LCM by prime factorisation method (1 1/2)
42 , 36, 18
4. Solve the following questions 94x3=12)
a) Four bells toll at intervals of 3,7,12,and 14 seconds. If they begin to toll together
at 5pm, when will they next toll together?
b) The HCF and LCM of two numbers are 12 and 72 respectively. If one of the number is 36, find the other.
c) Find the greatest possible length of a tape, which can complete measure three ropes measurig 42m, 35m and 105m.
d) Find the HCF by long division method.
1216, 2400, 912
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