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Questions(2178)
    Length of railway platform of a small town is $150$ metre. A passenger sitting in the train noted it crossed the platform in just $5$ seconds. Find the speed of the train . If the train was $250$ m long, how much time will the train take in crossing the platform?
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    $8,14,18,22,\_\_$
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    $420$ females can finish a certain piece of work in $20$ days. After they began to work, $20$ females left the work after every $5$ days. Find the number of days required to complete the work.
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    Find the number of ways in which ten different flowers can be strung together
    to make a garland in such a way that three particular flowers are always
    together.
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    A and B together can do a work in $16$ days, which B and C together can do in $32$ days. After A has been working at it for $15$ days and B for $13$ days, C finished it in $10$ days. In how many days A and C alone will do the work respectively?
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    A and B pick a card at random from a well shuffled pack of cards, one after the other replacing it every time till one of them gets a queen. If A begins the game, then the probability that A wins the game is
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    A ferris wheel has five cars, each containing four seats in a row. There are $20$ people ready for a ride. In how many ways can the ride begin? What if a certain two people want to sit in different cars?
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    An urn contains $6$ red, $4$ blue, $2$ green and $3$ yellow marbles. If four marbles are picked at random, what is the probability that at least one is blue?
    $(a) \dfrac{5}{91}\quad(b) \dfrac{1}{35}\quad(c) \dfrac{1}{3}\quad(d) \dfrac{4}{105}\quad(e)$ None of these
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    In a certain code 'COMPUTER' is coded as 'LNBVQSFU'. How is 'BULKHEAD' written in that code?
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    A roller coaster has five cars, each containing four seats, two in front and two in back. There are $20$ people ready for a ride. In how many ways can the ride begin? What if a certain two people want to sit in different cars?
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