Cognizant placement paper - 7
1.Train A starts from station A at 11.am.Train B starts from station B at 12 noon.the speed of train A is 4 kmph, train B is 1 kmph for the first hour,2
kmph for the 2nd hour,3 kmph for the 3rd hour etc. At what time do the two trains meet? ans:2 PM
2.There is a coin collection.100 coins in all.4 people collect coins. Each collects a minimum of 10 coins. and each has different number of coins. the
numbers are even. (4 questions based on this)
3.Find the area of the square which is covered by the circle.
The area is 1/3 area of the square. Find the side of the square.
4.Find the number of integers divisible by either 3 and 12 from 1 to 999.
5.Find the number of integers divisible by either 3 or 2 from 100 to 200 including both,
6.There is a cube of side 4 cm. The faces are coloured in red. the cube is cut into pieces of size 1 cm. How many cubes have no colour Ans:8
7.There are 80 coins .One coin is counterfeit in weight.How many minimum weighings are required to find out the counterfeit coin? Ans 4
8.There are 31 kgs of rice .With a 1 kg weight,Find out the minimum number of weighings required to weigh 31 kgs.
9.there are four contestants in a beauty contest.they aer Ms.UP,Ms. MP,
Ms.AP and Ms.WB.each is wearing a different colour saree(red,blue,green and white).They are seated in a row.The winner and runner are not sitting near each
other.Ms.WB is noehter the winner nor the runner.the green and white saree contestans are sitting in either end and the green color saree contestant is the
10.there is a pack of cards.Find the sum of integers excluding all the picture cards. Ans.216
11.There are 2 cars moving in opposite directions.the distance between them is 300cm.They move forward for 100cm with a speed of 50 cm/s,and omes back 50
cms at 25cm/s.after how many seconds will the cars collide?