IIT JEE Practice Question and Answer
8Q: Crack the code & Unlock the Key ? 1967 05b5cc6d2e4d2b4197774e42e
5b5cc6d2e4d2b4197774e42e- 1062false
- 2602false
- 3042true
- 4204false
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Answer : 3. "042"
Explanation :
Answer: C) 042 Explanation: From all the hints given, only 042 satisfies and it unlocks the key.
Q: Sound travels fastest in 1966 05b5cc675e4d2b4197774c11b
5b5cc675e4d2b4197774c11b- 1Vacuumfalse
- 2Airfalse
- 3Glasstrue
- 4Waterfalse
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Answer : 3. "Glass"
Explanation :
Answer: C) Glass Explanation: Sound is a mechanical vibration and needs a medium for propagation. The higher the density of the medium, the faster the sound travels. So, sound cannot travel through vacuum. As the sound travels faster in solids than liquids and gases, sound travels faster in the glass than Air and water.
Q: who was the first non-human to win an Oscar? 1966 05b5cc6bbe4d2b4197774d816
5b5cc6bbe4d2b4197774d816- 1Pussycatfalse
- 2Mickey Mousetrue
- 3Ninjafalse
- 4Benderfalse
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Answer : 2. "Mickey Mouse"
Explanation :
Answer: B) Mickey Mouse Explanation: Mickey Mouse was the first non-human to win an Oscar in 1932. Walt Disney won the first of his many Oscars for the creation of Mickey Mouse.
Q: India derives its name from 1965 05b5cc699e4d2b4197774c6a5
5b5cc699e4d2b4197774c6a5- 1The Hindusfalse
- 2The Aryansfalse
- 3Indus Rivertrue
- 4Lord Indrafalse
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Answer : 3. "Indus River"
Explanation :
Answer: C) Indus River Explanation: The name India is originally derived from the name of the river Sindhu (Indus River).
Q: Sandeep got Rs. 6000 as his share out of the total profit of Rs. 9000 which he and Saketh earned at the end of one year. If Sandeep invested Rs. 20000 for 6 months, whereas Saketh invested his amount for the whole year, the amount invested by Saketh? 1964 05b5cc6a6e4d2b4197774cdd9
5b5cc6a6e4d2b4197774cdd9- 1Rs. 5000true
- 2Rs. 6200false
- 3Rs. 8100false
- 4R. 7600false
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Answer : 1. "Rs. 5000"
Explanation :
Answer: A) Rs. 5000 Explanation: Let the amount invested by saketh = RS. p Now, that of sandeep = 20,000 x 6 saketh = 12 x p Ratio of their earnings = 120000 : 12p = 6000 : (9000 - 6000) => 12000012p = 60003000 => p= Rs. 5000 Hence, the amount investe by saketh = Rs. p = Rs. 5000.
Q: The number of ways in which six boys and six girls can be seated in a row for a photograph so that no two girls sit together is ? 1964 05b5cc6e2e4d2b4197774ec3e
5b5cc6e2e4d2b4197774ec3e- 12(6!)false
- 26! x 7false
- 36! x ⁷P₆true
- 4Nonefalse
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Answer : 3. "6! x ⁷P₆"
Explanation :
Answer: C) 6! x ⁷P₆ Explanation: We can initially arrange the six boys in 6! ways.Having done this, now three are seven places and six girls to be arranged. This can be done in ⁷P₆ ways. Hence required number of ways = 6! x ⁷P₆
Q: If a trader sold two cars each at Rs. 404415 and gains 15% on the first and loses 15% on the second, then his profit or loss percent on the whole is ? 1963 05b5cc6d8e4d2b4197774e732
5b5cc6d8e4d2b4197774e732- 11.44 %false
- 22.02 %false
- 31.04 %false
- 42.25 %true
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Answer : 4. "2.25 %"
Explanation :
Answer: D) 2.25 % Explanation: SP of each car is Rs. 404415, he gains 15% on first car and losses 15% on second car. In this case, there will be loss and percentage of loss is given by = [(profit%)(loss%)]/100 = (15)(15)/100 % = 2.25%
Q: Indian captain Virat Kohli became the first captain to hit six double centuries in Test cricket. He has surpassed - 1963 05b5cc6bbe4d2b4197774d820
5b5cc6bbe4d2b4197774d820- 1Steve Smithfalse
- 2Brian Laratrue
- 3Michael Clarkefalse
- 4Don Bradmanfalse
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Answer : 2. "Brian Lara"
Explanation :
Answer: B) Brian Lara Explanation: Virat Kohli surpasses Brian Lara with sixth Test double hundred as captain. After reaching the milestone, Virat Kohli became the first captain to score six double tons in Test cricket. He has also become the first player to score six double centuries in just a span of 17 months. He also became the second Indian to score back-to-back double centuries, only after Vinod Kambli. Apart from him, the only other cricketers who have scored back-to-back double Test tons are Wally Hammond, Don Bradman, Kambli, Kumar Sangakkara and Michael Clarke.