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the population of a town increases 22 % and 25 % respectively in two consecutive years . after the growth the present population of the town is 1220 . then what is the population of the town 2 years ago ? | 2gain
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in how many v ways can a 4 - letter password be chosen , using the letters a , b , c , d , e , and / or f , such that at least one letter is repeated within the password ? | 0general
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the average expenditure of a labourer for 6 months was 85 and he fell into debt . in the next 4 months by reducing his monthly expenses to 60 he not only cleared off his debt but also saved 30 . his monthly income is | 0general
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what is the greatest positive integer x such that 7 ^ x is a factor of 343 ^ 10 ? | 0general
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in the xy - coordinate system , what is the slope of the line that goes through the point ( 4 , 4 ) and is equidistant from the two points p = ( 0 , 2 ) and q = ( 12 , 8 ) ? | 0general
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a sum of money is sufficient to pay b ' s wages for 12 days and c ' s wages for 24 days . the same money is sufficient to pay the wages of both for ? | 0general
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jonathan , matthew and zac are picking strawberries from their yard . together they have picked a total of 550 strawberries . jonathan and matthew have picked 350 strawberries together . matthew and zac have picked 250 strawberries together . how many strawberries has zac picked by himself ? | 0general
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in a certain parallelogram the degree measure of one angle exceeds that of the other by 70 what is the degree measure of the smaller angle ? | 3geometry
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a candidate got 35 % of the votes and lost to the rival by 1350 votes . how many votes were cast ? | 2gain
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the product of two numbers is 2028 and their h . c . f . is 13 . the number of such pairs is : | 0general
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a train 140 m long crosses a platform 160 m long in 16 sec ; find the speed of the train ? | 1physics
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a zeebra chases a tiger 5 hours after the tiger runs . zeebra takes 6 hours to reach the tiger . if the average speed of the zeebra is 55 kmph , what s the average speed of the tiger ? | 1physics
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if a certain coin is flipped , the probability that the coin will land heads is 1 / 2 . if the coin is flipped 5 times , what is the probability that it will land heads up on the first 4 flips but not on the last flip ? | 4probability
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a fruit seller had some apples . he sells 40 % and still has 420 apples . originally , he had ? | 2gain
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the average age of students of a class is 15.8 years . the average age of boys in the class is 16.2 years and that of the girls is 15.4 years . the ration of the number of boys to the number of girls in the class is : | 0general
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a number is doubled and 9 is added . if resultant is trebled , it becomes 75 . what is that number | 0general
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a batsman scored 210 runs which included 3 boundaries and 8 sixes . what % of his total score did he make by running between the wickets | 0general
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( 112 x 5 ^ 4 ) = ? | 0general
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x + ( 1 / x ) = 2 find x ^ 2 + ( 1 / x ^ 2 ) | 0general
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what least no . must be subtracted from 427398 so that remaining no . is divisible by 15 ? | 0general
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in a box of 12 pens , a total of 3 are defective . if a customer buys 2 pens selected at random from the box , what is the probability that neither pen will be defective ? | 0general
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if a sum of money doubles itself in 15 years at simple interest , the ratepercent per annum is | 2gain
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alok ordered 16 chapatis , 5 plates of rice , 7 plates of mixed vegetable and 6 ice - cream cups . the cost of each chapati is rs . 6 , that of each plate of rice is rs . 45 and that of mixed vegetable is rs . 70 . the amount that alok paid the cashier was rs . 883 . find the cost of each ice - cream cup ? | 0general
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if a person walks at 16 km / hr instead of 8 km / hr , he would have walked 20 km more . the distance traveled by him if he walked at 16 km / hr ? | 0general
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drum x is 1 / 2 full of oil and drum y , which has twice the capacity of drum x , is 1 / 3 full of oil . if all of the oil in drum x is poured into drum y , then drum y will be filled to what capacity ? | 0general
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find the area of trapezium whose parallel sides are 26 cm and 18 cm long , and the distance between them is 15 cm . | 1physics
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a train 160 m long passes a man , running at 6 kmph in the direction opposite to that of the train , in 6 seconds . the speed of the train is | 1physics
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an aeroplane covers a certain distance at a speed of 240 kmph in 6 hours . to cover the same distance in 1 2 / 3 hours , it must travel at a speed of : | 1physics
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if 9 engines consume 24 metric tonnes of coal , when each is working 8 hoursday , bow much coal will be required for 8 engines , each running 13 hours a day , it being given that 3 engines of former type consume as much as 4 engines of latter type ? | 1physics
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the value of log 2 ( log 5625 ) is | 5other
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if 16 percent of the students at a certain school went to a camping trip and took more than $ 100 , and 75 percent of the students who went to the camping trip did not take more than $ 100 , what percentage of the students at the school went to the camping trip ? | 0general
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a man sitting in a train which is traveling at 55 kmph observes that a goods train , traveling in opposite direction , takes 10 seconds to pass him . if the goods train is 320 m long , find its speed | 1physics
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a man invests some money partly in 10 % stock at 90 and partly in 5 % stock at 90 . to obtain equal dividends from both , he must invest the money in the ratio : | 5other
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average of 10 matches is 32 , how many runs one should should score to increase his average by 6 runs . | 0general
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solve below question 2 x + 1 = - 23 | 0general
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calculate 85184 梅 ? = 352 | 0general
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7.51 8.22 7.86 8.36 8.09 7.83 8.30 8.01 7.73 8.25 7.96 8.53 a vending machine is designed to dispense 8 ounces of coffee into a cup . after a test that recorded the number of ounces of coffee in each of 1000 cups dispensed by the vending machine , the 12 listed amounts , in ounces , were selected from the data above . if the 1000 recorded amounts have a mean of 8.1 ounces and a standard deviation of 0.4 ounces , how many of the 12 listed amounts are within 1.5 standard deviation of the mean ? | 0general
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