51. A, B, C and D purchase a gift worth Rs. 60. A pays $$\frac{{1}}{{2}}$$ of what others are paying. B pays $$\frac{{1}}{{3}}$$ of what others are paying and C pays $$\frac{{1}}{{4}}$$ of what others are paying. What is the amount paid by D ?
52. The value of $$\frac{1}{{15}} + $$ $$\frac{1}{{35}} + $$ $$\frac{1}{{63}} + $$ $$\frac{1}{{99}} + $$ $$\frac{1}{{143}}$$ is :
53. In a class, there are 'z' students. Out of them 'x' are boys. What part of the class is composed of girls ?
54. A person gives $$\frac{1}{4}$$ of his property to his daughter, $$\frac{1}{2}$$ to his sons and $$\frac{1}{5}$$ for charity. How much has he given away ?
55. Symbiosis runs a Corporate Training Programme. At the end of running the first programme, its total takings were Rs. 38950. There were more than 45 but less than 100 participants. What was the participant fee for the programme ?
56. The least number more than 5000 which is divisible by 73 is -
57. What is 348 times 265 ?
58. The number 534677 is divisible by 777. The difference of divisor and remainder is :
59. Which of the following is a prime number ?
60. If $$13 = \frac{{13w}}{{\left( {1 - w} \right)}}$$ , then (2w)2 = ?
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