76. The average weight of a group consisting of 7 people is 55 kg. Two people with a total weight of 124 kg left the group and three people whose average weight is 61 kg joined the group. What is the new average weight of the group?
78. In how many different ways can 5 men and 3 women be seated in a row such that no two women are next to each other?
79. Half the length of the the diagonal of a square measures $$5\sqrt{2}$$ cm. What is the perimeter of the square?
80. 6.42 + 8.98 + 10.33 - 5.34 - 2.79 = ?
81. The sum of ages of a husband and wife in 2010 is 48 years. What will be the sum of their ages in 2022?
82.
Find the next term in the series.442, 378, 346, 330, 322
83.
Find the next term in the series.20,40,61,84,111
84.
Find the next term in the series.1,7,17,31,49,71
85.
Find the next term in the series.2,4,8,14,22,32
86.
Find the next term in the series.2,12,36,80,150
87. $$\sqrt{15376} * \sqrt{1/576}$$ = ?
88. 78 * 2.5 * 9 * 130 + 5 = ?
89. What is the smallest natural number that has to be subtracted from 4100 so as to get a number that is both a perfect square as well as a perfect cube?
91. A tap A fills a tank in 30 hours. Another tap B fills the tank in 24 hours. If the taps are opened for one hour each alternately, in how many hours would the tank be full?
92. The speeds of a boat downstream and upstream are 18 km/hr and 8 km/hr respectively. What is the speed of the stream?
93. What is the interest that has to be paid on a sum of Rs 40000 borrowed for 2 years at 5% p.a. compounded annually?
94. A shopkeeper uses a weight of 960 g instead of 1000 g. What is his gain%?
95. 75% of 34% of a number if 125. What is 170% of that number?
96. If the area of a rectangle is 2 times the perimeter of the square with side 5m and length of the rectangle is 8 m. then what will be the breadth of the rectangle?
97. 99 * 4/11 * 88 * 3/11 * 77 * 2/11 = ?
98. If A, B and C completes a work in 5,7 and 9 days respectively then together in how many days they will complete the work?
99. What is the LCM of the following fractions? 3/11, 2/5, 1/9
100. A 400 meter long train crosses a man who is travelling in opposite direction with a speed of 10 kmph in 4 seconds. Find the speed of the train (in km/h)?
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