41. A's salary is 50% more than that of B. Then B's salary is less than that of A by :
42. If 60% of A = 30% of B, B = 40% of C and C = x% of A, then value of x is :
43. In an examination 70% of the candidate passed in English, 80% passed in Mathematics, 10% failed in both subjects. If 144 candidates passed in both, the total number of candidates was :
44. Raman's salary is increased by 5% this year. If his present salary is Rs. 1806, the last year's salary was :
45. If 80% of A = 50% of B and B = x% of A, then the value of x is :
46. The percentage of metals in a mine of lead ore is 60%. Now the percentage of silver is $$\frac{3}{4}$$% of metals and the rest is lead. If the mass of ore extracted from this mine is 8000 kg, the mass (in kg.) of lead is :
47. If 120 is 20% of a number, then 120% of that number will be :
48. 498 is 17% less than a number then the number is :
49. If radius of a circle is increased by 5%, then the increase in it's area is :
50. If 60% of A's income is equal to 75% of B's income, then B's income is equal to x% of A's income. The value of x is :
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