91. A litre of water evaporates from 6L of sea water containing 4% salt. Find the percentage of salt in the remaining solution.
92. Two discount of 8% and 12% are equal to a single discount of:
93. In a library 60% of the books are in Hindi, 60% of the remaining books are in English rest of the books are in Urdu. If there are 3600 books in English, then total no. of books in Urdu are:
94. In Sabarmati Express, there as many wagons as there are the no. of seats in each wagon and not more than one passenger can have the same berth (seat). If the middlemost compartment carrying 25 passengers is filled with 71.428% of its capacity, then find the maximum no. of passengers in the train that can be accommodated if it has minimum 20% seats always vacant.
95. The population of a village is 5000 and it increases at the rate of 2% every year. After 2 years, the population will be:
96. In a class, the no. of boys is more than the no. of girls by 12% of the total strength. The ratio of boys and girls is:
97. In an office there were initially N employees. The HR manager first hired P% employees then after a month Q% employees left the office, the value of (P - Q) is:
98. The amount of work in a leather factory is increased by 50%. By what percent is it necessary to increase the number of workers to complete the new amount of work in previously planned time, if the productivity of the new labour is 25% more.
99. A big cube is formed by rearranging the 160 coloured and 56 non-coloured similar cubes in such a way that the expouser of the coloured cubes to the outside is minimum. The percentage of exposed area that is coloured is:
100. 78% of 750 + 34% of x = 30% of 2630. Find x.
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