IIT JEE Practice Question and Answer
8Q: A person got Rs.48 more when he invested a certain sum at compound interest instead of simple interest for two years at 8% p.a. Find the sum ? 2297 05b5cc6e0e4d2b4197774eb61
5b5cc6e0e4d2b4197774eb61- 1Rs.8000false
- 2Rs.6500false
- 3Rs.7500true
- 4Rs.5000false
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Answer : 3. "Rs.7500"
Explanation :
Answer: C) Rs.7500 Explanation: p=d×1002R2 Where d is difference, r is rate of interest. => (48 x 100 x 100) / 8 x 8 = Rs.7500
Q: Which statement regarding the mammalian heart is correct? 2297 05b5cc615e4d2b4197774b6e7
5b5cc615e4d2b4197774b6e7- 1Blood is pumped from the heart via the atria.false
- 2Oxygen-loaded blood moves only through the right side of the heart.false
- 3When the right atrium contracts, it forces blood into the left atrium.false
- 4In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs.true
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Answer : 4. "In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs."
Explanation :
Answer: D) In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs. Explanation: In the adult heart, blood in the right chambers of the heart cannot enter the left chambers without passing through the lungs is correct regarding mammalian heart.
Q: Ronika deposited Rs.7000 which amounted to Rs.9200 after 3 years at simple interest. Had the interest been 2% more. She would get how much ? 2295 05b5cc6d4e4d2b4197774e5c5
5b5cc6d4e4d2b4197774e5c5- 19850false
- 29500false
- 39620true
- 49760false
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Answer : 3. "9620"
Explanation :
Answer: C) 9620 Explanation: As the interest rate increases by 2%=> (7000x3x2)/100 = 420 9200 -------- 9620
Q: Which of the following is not a sedimentary structure? 2294 05b5cc69ae4d2b4197774c7a7
5b5cc69ae4d2b4197774c7a7- 1graded beddingfalse
- 2rock colortrue
- 3ripple marksfalse
- 4mudcracksfalse
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Answer : 2. "rock color"
Explanation :
Answer: B) rock color Explanation: Except Rock color, all other Graded bedding, Ripple marks and Mud cracks are sedimentary structures.
Q: What is the probability that a leap year has 53 Saturdays and 52 Sundays ? 2293 05b5cc6dfe4d2b4197774eada
5b5cc6dfe4d2b4197774eada- 11/7true
- 22/7false
- 31/2false
- 43/2false
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Answer : 1. "1/7"
Explanation :
Answer: A) 1/7 Explanation: A leap year has 52 weeks and two daysTotal number of cases = 7Number of favourable cases = 1i.e., {Friday, Saturday} Required Probability = 1/7
Q: Oar is to rowboat as foot is to 2292 05b5cc672e4d2b4197774c07d
5b5cc672e4d2b4197774c07d- 1Walkfalse
- 2Loafersfalse
- 3Skateboardtrue
- 4Runningfalse
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Answer : 3. "Skateboard"
Explanation :
Answer: C) Skateboard Explanation: A rowboat can be put into motion by using oar. Similaarly, a skateboard can be put into motion by using foot. The other options like walk and running are not objects to be in motion. And loafers are something worn on foot. Hence, Oar : Rowboat :: Foot : Skateboard.
Q: If Reena’s age was twice of her present age, when subtracted from four times three years from hence, with three times the three years before her present age. What will be her age after one year ? 2292 05b5cc70ee4d2b4197774f37b
5b5cc70ee4d2b4197774f37b- 122 yrstrue
- 221 yrsfalse
- 320 yrsfalse
- 424 yrsfalse
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Answer : 1. "22 yrs"
Explanation :
Answer: A) 22 yrs Explanation: Let Reena’s present age be 'K' yrs.Given:{(K+3) x 4} - {(K-3) x 3)} => K = 21 yrsSo her present age is 21 yrs.Then, her age after 1 year is 22 yrs.
Q: The first 8 alphabets are written down at random. what is the probability that the letters b,c,d,e always come together ? 2291 05b5cc6d3e4d2b4197774e4d7
5b5cc6d3e4d2b4197774e4d7- 11/7false
- 28!false
- 37!false
- 41/14true
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Answer : 4. "1/14"
Explanation :
Answer: D) 1/14 Explanation: The 8 letters can be written in 8! ways.n(S) = 8!Let E be the event that the letters b,c,d,e always come together when the first 8 alphabets are written down.Now the letters a, (bcde), f, g and h can be arranged in 5! ways.The letters b,c,d and e can be arranged themselves in 4! ways.n(E) = 5! x 4!Now, the required P(E) = n(E)/n(S) = 5! x 4!/8! = 1/14Hence the answer is 1/14.