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Posted Date: 03 Sep 2009 Posted By: arivazhagan Member Level: Bronze
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2007 Delhi State B.Sc Mathematics APTITUDE model questions(with answers) University Question paper
1. Using the digits 1,5,2,8 four digit numbers are formed and the sum of all possible such numbers.
Ans: 106656
2. Four persons can cross a bridge in 3,7,13,17 minutes. Only two can cross at a time. Find the minimum time taken by the four to cross the bridge.
Ans: 20
3. Find the product of the prime numbers between 1-20.
Ans: 9699690
4. 2,3,6,7 using these numbers form the possible four digit numbers that are divisible by 4.
Ans: 8
5. Two trains are traveling at 18kmph and are 60 km apart. There is fly in the train. it flies at 80 kmph. It flies and hits the second train and then it starts to oscillate between the two trains. At one instance when the two trains collide it dies. Distance traveled by the fly when both trains collide is?
Ans: 12km
6. There are 1000 doors that are of the open-close type. When a person opens the door he closes it and then opens the other. When the first person goes he opens-closes the doors in the multiples of 1 i.e., he opens and closes all the doors. when the second goes he opens and closes the doors 2, 4 6 8 respectively. Similarly when the third one goes he does this for 3 6 9 12 15th doors respectively. Find number of doors that are open at last.
Ans:Square Numbers.
7.There are 9 balls of this one is defective. Find the minimum no. of chances of finding the defective one.
Ans:3times.
8. There are coins of Rs.5, 2,1,50p,25p,10p,5p. Each one has got a weight. Rs 5 coin weighs 20gms. Find the minimum number of coins to get a total of 196.5gms.
9.A can do a work in 8 days, B can do a work in 7 days, C can do a work in 6 days. A works on the first day, B works on the second day and C on the third day respectively that is they work on alternate days. When will they finish the work.(which day will they finish the work)
Ans: 7 7/168 days
10.A batsman scores 23 runs and increases his average from 15 to 16. find the runs to be made if he wants top inc the avg to 18 in the same match.
Ans: 39 Runs.
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