Boat and stream Question no. 1 A person can swim in still water at 4 km/h. If the speed of water is 2 km/h, how many hours will the man take to swim back against the current for 6 km. looks_one 3 looks_two 4 looks_3 4.5 looks_4 None of these Answer Option looks_one 3 Solution Solution : Speed of swim = 4 km/hr Speed of water = 2 km/ hr against the water speed of swim = 2 km/hr Time taken by man = distance/ speed = 6 / 2 = 3 hr Question no. 2 A man can swim in still water at 4.5 km/h, buttakes thrice as long to swim upstream than downstream. The speed of the stream is looks_one 2.25 looks_two 2 looks_3 3 looks_4 None of these Answer Option looks_one 2.25 Solution Solution : speed of swim = 4.5 km/hr Time taken to downstream = x hr Time taken to upstream = 3x hr Speed of stream = z distance of upstream = distance of downstream (4.5 - z) * 3x = (4.5 + z )* x ( 4.5 - z )* 3 = 4.5 + z 4.5 + z = 13.5 - 3...

Permutation and Combination Question no. 16 What is the number of three digit odd numbers formed by using the digits 1,2,3,4,5,6 if repetition of digits is allowed ? looks_one 60 looks_two 108 looks_3 120 looks_4 216 Answer Option looks_two 108 Solution Solution : Number of digits at one's place = 1 , 3 , 5 [Total number is 3] Number of digits at ten's place = 6 [1,2,3,4,5,6] Number of digits at hundred place =6 [ 1, 2 , 3 , 4 , 5 , 6 ] Total number of ways = 3 * 6 * 6 = 108 Question no. 17 What is the number of ways of arranging the letters of the word "BANANA" so that no two N's appear together? looks_one 60 looks_two 40 looks_3 80 looks_4 100 Answer Option looks_two 40 Solution Solution : Total no. of ways = 6!/(3!2!) = 60 Two N's come together = 4!*5 / 3! = 20 No. of ways no two N's appear together = 60 - 20 = 40 Question no. 18 How many times does the ...

profit and loss Question no. 1 If the manufacturer gains 10%, the wholesale dealer 15% and the retailer 25%, then find the cost of production of a table, the retail price of which is $ 1265? looks_one $800 looks_two $1000 looks_3 $900 looks_4 $600 Answer Option looks_one $800 Solution Solution : the cost of production of a table is x 110 % of x = wholesale cost price 115% of 110% of x = retailer cost price 125 % 115% of 110% of x = retailer selling price Question no. 2 If the cost price is 96% of the selling price, then what is the profit percent? looks_one 4.5 % looks_two 4 % looks_3 4.2 % looks_4 None of these Answer Option looks_3 4.2 % Solution Solution : CP = 0.96 SP Question no. 3 A man buys 50 pencils for Rs 100 and sells 45 pencils for Rs 90. Find his gain or loss %. looks_one 20 % looks_two 35 % looks_3 25 % looks_4 none of these Answer option looks_4 none of thes...

Work And time Question no. 1 The H.C.F and L.C.M of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are looks_one 273 , 357 looks_two 273 , 361 looks_3 273 , 359 looks_4 273 , 363 Answer Option looks_one 273 , 357 Solution Solution : HCF = 21 , LCM = 4641 = 13 * 3 * 7 * 17 Each number has 21 as factor First number = 21 * 13 = 273 Second Number = 21 * 17 = 357 Question no. 2 What is the smallest number which when increased by 5 is completely divisible by 8, 11 and 24? looks_one 264 looks_two 259 looks_3 269 looks_4 None of these Answer Option looks_two 259 Solution Solution : LCM ( 8 ,11 , 24) = 264 LCM is the smallest number that is divisible by all their factors 264 is the number completely divisible by 8, 11 and 24 Number is increased by 5 = 264 - 5 = 259 Question no. 3 Find the greatest number that will divide 148,246 and 623 le...