IIT JEE Practice Question and Answer
8Q: What kind of tree can you carry in your hand? 2748 05b5cc651e4d2b4197774bcfe
5b5cc651e4d2b4197774bcfe- Show AnswerHide Answer
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Answer :
Explanation :
Palm tree.
Q: The sum of 3rd and 15th elements of an arithmetic progression is equal to the sum of 6th, 11th and 13th elements of the same progression. Then which element of the series should necessarily be equal to zero ? 2747 15b5cc73ae4d2b4197774f8bf
5b5cc73ae4d2b4197774f8bf- 114th elementfalse
- 29th elementfalse
- 312th elementtrue
- 47th elementfalse
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Answer : 3. "12th element"
Explanation :
Answer: C) 12th element Explanation: If we consider the third term to be ‘x”The 15th term will be (x + 12d)6th term will be (x + 3d)11th term will be (x + 8d) and 13th term will be (x + 10d).Thus, as per the given condition, 2x + 12d = 3x + 21d.Or x + 9d = 0.x + 9d will be the 12th term. Thus, 12th term of the A.P will be zero.
Q: A contractor undertook to complete a piece of work in 120 Days and employed 140 men upon it. At the end of 66 days only half of the work was done,so he put on 25 extra men. By how much time did he exceed the specific time ? 2747 05b5cc709e4d2b4197774f2ad
5b5cc709e4d2b4197774f2ad- 12 daystrue
- 23 daysfalse
- 34 daysfalse
- 45 daysfalse
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Answer : 1. "2 days"
Explanation :
Answer: A) 2 days Explanation: work done=total number of person x number of days;half of work done = 140 x 66;For half of remaining work 25 extra men are added.Therefore, total men for half work remaining = 140 + 25 = 165;Let 2nd half work will be completed in K days;140 x 66 = 165 x KK = 122;Hence, extra days => 122-120 = 2days.
Q: Find the missing number in the given number series? 514, 470, ?, 415, 404 2745 05b5cc6a9e4d2b4197774cf19
5b5cc6a9e4d2b4197774cf19- 1441false
- 2437true
- 3426false
- 4420false
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Answer : 2. "437"
Explanation :
Answer: B) 437 Explanation: Given number series is 514 470 ? 415 404 Here the pattern it follows is 514 514 - 44 = 470 470 - 33 = 437 437 - 22 = 415 415 - 11 = 404 Hence, the missing number in the given number series is 437.
Q: Crack the Logical Password of the Mobile ? 2745 05b5cc6bfe4d2b4197774da19
5b5cc6bfe4d2b4197774da19- Show AnswerHide Answer
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Answer :
Explanation :
65292 1st digit is 3 x 2 = 6 3rd digit is 5-3 = 2 4th digit is 5+4 = 9 6+5 = 2+9 = 9+2 = 11
Q: Which of the following is not a macronutrient? 2744 05b5cc63de4d2b4197774babb
5b5cc63de4d2b4197774babb- 1Carbohydratesfalse
- 2Calciumfalse
- 3Chlorinetrue
- 4Proteinsfalse
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Answer : 3. "Chlorine"
Explanation :
Answer: C) Chlorine Explanation: Nutrients that are needed in large amounts are called Macronutrients. There are three macronutrients required by humans: 1. carbohydrates (sugar), 2. lipids (fats), and 3. proteins. Each of these macronutrients provides energy in the form of calories. Some other macronutrients are: nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), sulfur (S), magnesium (Mg), sodium (Na).
Q: Which unit holds data temporarily? 2743 05b5cc64de4d2b4197774bcb2
5b5cc64de4d2b4197774bcb2- 1Secondary storage unitfalse
- 2Output Unitfalse
- 3Primary Memory Unittrue
- 4Input unitfalse
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Answer : 3. "Primary Memory Unit"
Explanation :
Answer: C) Primary Memory Unit Explanation: Memory is the part of the computer that temporarily holds data and instructions before and after they are processed by the ALU. Memory is also known as primary storage, primary memory, main storage, internal storage, and main memory. Manufacturers often use the term RAM, which stands for random-access memory.
Q: Rajan's present age is three times his daughter's and nine-thirteenth of his mother's present age. The sum of the present ages of all three of them is 125 years. What is the difference between the present ages of Rajan's daughter and Rajan's mather ? 2736 05b5cc72ce4d2b4197774f773
5b5cc72ce4d2b4197774f773- 132 yearsfalse
- 248 yearsfalse
- 362 yearsfalse
- 450 yearstrue
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Answer : 4. "50 years"
Explanation :
Answer: D) 50 years Explanation: Let Rajan's present age be 'x' years.=> Then his daughter's present age is = x/3 years.His mother's present age = 13x/9 yearsNow, according to the question,x + x/3 + 13x/9 = 125=> x = 125x9/25 = 45Therefore, required difference = 13x/9 - x/3 = 13x - 3x/9 = 10x/9=> 10 x 45/9 = 50 years.