51. About the number of pairs which have 16 as their H.C.F. and 136 as their L.C.M. , we can definitely say that:
a) No such pair exists b) only one such pair exists.
c) Only two such pairs exist d) many such pairs exist.
52. The H.C.F. and L.C.M. of two numbers are 11 and 385 respectively. If one number lays between 75 and 125, then that number is:
a) 77 b) 88
c) 99 d) 110
53. The H.C.F. And L.C.M. of two numbers are 11 and 385 respectively. Of one number a lie between 75 and 125, then that number is:
a) 666 b) 669
c) 696 d) 966
54. L.C.M. of two prime numbers X and y (X>y) is 161. The value of 3y – X is:
a) -2 b) -1
c) 1 d) 2
55. The greatest number that exactly divides 105, 1001 and 2436 is:
a) 3 b) 7
c) 11 d) 21
56. The greatest possible length which can be used to measure exactly the length 7 m, 3m 85 cm, 12m 95 cm is:
a) 15 cm b) 25 cm
c) 35 cm d) 42 cm
57. Three different containers contain 496 liters, 403 liters and 713 liters of mixtures of milk and water respectively. What biggest measure can measure all the different quantities exactly?
a) 1 litre b) 7 litres
c) 31 litres d) 41 litres.
58. the maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same numbers of pencils is:
a) 91 b) 910
c) 1001 d) 1911
59. A rectangular courtyard 3.78 meters long and 5.25 metres wide is to behaved exactly with square tiles, all of the same size. What is the largest size of the title which could be used for the purpose?
a) 14 cms b) 21 cms
c 42 cms d) none of these.
60. Find greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case.
a) 4 b) 7
c) 9 d) 17
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