IIT JEE Practice Question and Answer
8Q: 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 ? 4568 05b5cc70ee4d2b4197774f36f
5b5cc70ee4d2b4197774f36f- 117 minutesfalse
- 220 minutestrue
- 334 minutesfalse
- 412 minutesfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "20 minutes"
Explanation :
Answer: B) 20 minutes Explanation: First send 17 and 7. After 7 minutes, 7 is at finish and 17 needs 10 more minutes to complete his travel. now send 13. After 10 minutes 17 reaches finish and 13 needs 3 more minutes to complete. now send 3. both 3 and 13 reach destination at the same time after 3 minutes. hence the time taken is 7+10+3=20 minutes.
Q: What is the next letter of the following sequence. N , O , M , P , L , Q , K , R , ? 4557 05b5cc731e4d2b4197774f80a
5b5cc731e4d2b4197774f80a- 1Sfalse
- 2Ifalse
- 3Jtrue
- 4Tfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "J"
Explanation :
Answer: C) J Explanation: Here the series has mixed two series.n m l k...! reverse alphabeto p q r ...! forward alphabetSo the letter before k is j and after that letter after r is s and so on...
Q: Exhibit : display :: send : ? 4520 05b5cc69ae4d2b4197774c7b8
5b5cc69ae4d2b4197774c7b8- 1Stampfalse
- 2Receivefalse
- 3Showfalse
- 4Emittrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Emit"
Explanation :
Answer: D) Emit Explanation: Here the given words represent synonyms. Exhibit and Display are synonyms for each other. Similarly, Send and Emit are synonyms for each other. Hence, Exhibit : display :: send : Emit.
Q: Two trains namely X & Y leave station 'A' at 6.30am and 7.40am and travel at 30km/hr and 40 km/hr respectively. How many kms from 'A' will the trains meet ? 4455 05b5cc745e4d2b4197774fa5e
5b5cc745e4d2b4197774fa5e- 1140 kmstrue
- 2120 kmsfalse
- 396 kmsfalse
- 4142 kmsfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "140 kms"
Explanation :
Answer: A) 140 kms Explanation: It is given train X leave station A at 6:30 am, here it is asked to calculate the distance from A when the trains meet, theDistance traveled by train left at 6:30 am upto 7:40 am i.e. in 1 hr. 10 min. or 7/6 hours = 30 x 7/6 = 35 kmSo train leaving at 7:40 am will meet first train after covering a distance of 35 km. with relative speed of 40-30=10 km/hr.Hence time taken = 35/10 = 3.5 hours or 3 hours 30 minutesSo distance from A = Distance traveled by 2nd train in 3 hr. 30 min = 40 x 3.5 = 140 km.
Q: Odometer is to Mileage as Compass is to 4430 05b5cc6a4e4d2b4197774cc5a
5b5cc6a4e4d2b4197774cc5a- 1Directiontrue
- 2Niddlefalse
- 3Speedfalse
- 4Altitudefalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "Direction"
Explanation :
Answer: A) Direction Explanation: An odometer is an instrument which is used to measure Mileage of a vehicle. In the same way, Compass is an instrument used to know the direction. Hence, Odometer : Mileage :: Compass :: Direction.
Q: The Capacity of a Communication Channel is Measured in 4427 05b5cc6afe4d2b4197774d1c9
5b5cc6afe4d2b4197774d1c9- 1Band ratefalse
- 2Band widthtrue
- 3Data flowfalse
- 4Bit capacityfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Band width"
Explanation :
Answer: B) Band width Explanation: The path that data takes from source to destination is called a Channel. A channel is a communication medium. A channel has a certain capacity for transmitting information. The "capacity" of a channel is the theoretical upper-limit to the bit rate over a given channel that will result in negligible errors. Channel capacity is often measured by its Bandwidth in Hz or its data rate in bits per second.
Q: In a scheme, a pack of three soaps with MRP Rs.45 is available for Rs.42. If it still gives a profit of 5% to the shopkeeper, then the cost price of the pack is ? 4424 05b5cc728e4d2b4197774f737
5b5cc728e4d2b4197774f737- 138false
- 239false
- 340true
- 441false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "40"
Explanation :
Answer: C) 40 Explanation: Given M.P=45,S.P=42, Profit = 0.05 Let C.P=x , Then Profit = (42-x)/x = 0.05=> x = 40.
Q: 19 persons do 19 programs in 19 hours . If they take 15 mins interval and then how much time they need to do 52 programs. 4423 05b5cc754e4d2b4197774fb6d
5b5cc754e4d2b4197774fb6d- 123 hoursfalse
- 247 hrs 15 minfalse
- 352 hrs 15 mintrue
- 422 hrs 15 minfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "52 hrs 15 min"
Explanation :
Answer: C) 52 hrs 15 min Explanation: Since they can do 19 programs in 19 hours, Then 52 programs in 52 hours respectively.And a 15 min intervalTotal time they take to do 52 programs is 52 hours 15 minutes.