There were N stations on a railroad. After adding X stations
46 additional tickets have to be printed.
Find N and X.
Answers were Sorted based on User's Feedback
Answer / guest
Let before adding X stations, total number of tickets
t = N(N-1)
After adding X stations total number of tickets are
t + 46 = (N+X)(N+X-1)
Subtracting 1st from 2nd
46 = (N+X)(N+X-1) - N(N-1)
46 = N2 + NX - N + NX + X2 - X - N2 + N
46 = 2NX + X2 - X
46 = (2N - 1)X + X2
X2 + (2N - 1)X - 46 = 0
Now there are only two possible factors of 46. They are
(46,1) and (23,2)
Case I: (46,1)
2N - 1 = 45
2N = 46
N = 23
And X = 1
Case II: (23,2)
2N - 1 = 21
2N = 22
N = 11
And X = 2
Hence, there are 2 possible answers.
| Is This Answer Correct ? | 33 Yes | 4 No |
Answer / karthikeya subburaj
N=46
X=1
S0 extra 46 tickets have to be printed.
| Is This Answer Correct ? | 1 Yes | 13 No |
X is a five letter word. if u remove the first letter, it is the name of the country.if u remove first two letters it is opposite to female.... find out 'x' friendzzzzzzzzzz....
11 Answers Aircel, Emirates, Roman, WhatsApp, Yahoo,
One light light flashes 3 times in a minute and an another light flases 3 times in 2 minutes.Find the duration after which both lights will flash same number of times.
arrange these alphabets evenymroin in to three words
Somebody marked the six faces of a die with the numbers 1, 2 and 3 - each number twice. The die was put on a table. Four people - Abu, Babu, Calu and Dabu - sat around the table so that each one was able to see only three sides of the die at a glance. ? Abu sees the number 1 and two even numbers. ? Babu and Calu can see three different numbers each. ? Dabu sees number 2 twice and he can't remember the third number. What number is face down on the table?
How many squares are there in a 5 inch by 5 inch square grid? Note that the grid is made up of one inch by one inch squares.
A thief steals half the total no of loaves of bread plus 1/2 loaf from a bakery. A second thief steals half the remaining no of loaves plus 1/2 loaf and so on. After the 5th thief has stolen there are no more loaves left in the bakery. What was the total no of loaves did the bakery have at the beginning
4 Answers Allianz, Essar, L&T, Misys, Wipro,
In a city, The police has surrounded the Bank. There are 50 people in the building. Each person is either an engineer or a manager of the bank. All computer files have been deleted, and all documents have been shredded by the managers.
If a rook and a bishop of a standard chess set are randomly placed on a chessboard, what is the probability that one is attacking the other? Note that both are different colored pieces.
3 men are running in circle man A run with 20m/hr, man B run with 40m/hr, man C run with 50 m/hr , and the radius of cirlce is 200m then at what time they will meet together
xx7 and xxx are two numbers and we have to mulitply them xx7 xxx ______ xxxx xxxxxx ______ 3xxx17 find all x's
3. During a recent school reunion, four men were discussing their starting salaries back in 1962. the salaries in questring were 8, 10,12 and 14 thousand pounds per year. of course the MP earned the most. Alan earned more than Brian and the doctor earned more thanb Derek, the vet. carles could not remember what he started on. Brian, the lawyer, did not start on 10,000 pounds nor did Derek. can you determine who has which job and their starting salaries?
two father and two son went to a hotel, each paid rs-5 but still total amount was rs-15, how?