IIT JEE Practice Question and Answer
8Q: What is the smallest unit that can evolve? 1324 05b5cc69de4d2b4197774c8d5
5b5cc69de4d2b4197774c8d5- Show AnswerHide Answer
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Answer :
Explanation :
The population is the smallest unit of living organisms that can undergo evolution.
Q: International Day of United Nations Peacekeepers was observed on 1324 05b5cc6dae4d2b4197774e8b4
5b5cc6dae4d2b4197774e8b4- 128 Mayfalse
- 229 Maytrue
- 330 Mayfalse
- 431 Mayfalse
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Answer : 2. "29 May"
Explanation :
Answer: B) 29 May Explanation: The United Nations General Assembly designated 29 May as the International Day of United Nations Peacekeepers. The day has two purposes: To honour the memory of the UN peacekeepers who have lost their lives in the cause of peace. To pay tribute to all the men and women who have served and continue to serve in UN Peacekeeping operations for their high level of professionalism, dedication and courage. The theme for the 2017 International Day of UN Peacekeepers is “Investing in Peace Around the World“.
Q: A, B and C started a business where their initial capital was in the ratio of 2:3:4. At the end of 6 months, A invested an amount such that his total capital became equal to C's initial capital investment. If the annual profit of B is Rs. 3000 then what is the total profit ? 1323 05b5cc6c4e4d2b4197774dcfb
5b5cc6c4e4d2b4197774dcfb- 1Rs. 8,640false
- 2Rs. 9,850false
- 3Rs. 10,000true
- 4Rs. 11,220false
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Answer : 3. "Rs. 10,000"
Explanation :
Answer: C) Rs. 10,000 Explanation: Ratio of investments of A, B & C = 2×6+4×6 : 3×12 : 4×12 = 36 : 36 : 48 = 6 : 6 : 8 But given that the annual profit of B is Rs. 3000 => 6 ratio = 3000 Then for the total annual profit of partners is 20 ratio = 3000 x 20/6 = 10,000.
Q: In a plane 8 points are colliner out of 12 points, then the number of triangles we get with those 12 points is 1323 05b5cc7b4e4d2b419777508ab
5b5cc7b4e4d2b419777508ab- 120false
- 2160false
- 3164true
- 4220false
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Answer : 3. "164"
Explanation :
Answer: C) 164 Explanation: For a triangle, we need 3 non-collinear points. So with 12 points (when all the 12 are such that any three non-collinear is12C3. But among them 8 points are collinear. If all these 8 points are different we get 8C3 triangles as they are collinear. In 12C3 triangles, we do not get 8C3 triangles Therefore, The number of triangles we get = 12C3-8C3 = 164
Q: Atomic mass of first 30 elements? 1319 05b5cc632e4d2b4197774b9d5
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Answer :
Explanation :
Here I give you the first 30 Atomic elements names and their Atomic masses. Atomic number Element Atomic mass 1 Hydrogen 1 2 Helium 4 3 Lithium 6.94 4 Beryllium 9.01 5 Boron 10.81 6 Carbon 12.01 7 Nitrogen 14.01 8 Oxygen 15.99 9 Fluorine 19.00 10 Neon 20.18 11 Sodium 22.99 12 Magnesium 25.31 13 Aluminium 26.98 14 Silicon 28.09 15 Phosphorus 30.97 16 Sulphur 32.07 17 Chlorine 35.45 18 Argon 39.95 19 Potassium 39.10 20 Calcium 40.08 21 Scandium 44.96 22 Titanium 47.87 23 Vanadium 50.94 24 Chromium 24. 52 25 Manganese 54.94 26 Iron 55.85 27 Cobalt 58.93 28 Nickel 58.69 29 Copper 63.55 30 Zinc 65.41
Q: I have keys but no locks, I have space but no room. You can enter but can't go outside. What am I? 1317 05b5cc622e4d2b4197774b7d9
5b5cc622e4d2b4197774b7d9- Show AnswerHide Answer
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Answer :
Explanation :
I am Keyboard. A Keyboard has keys of letters, space button and enter button.
Q: Where is Panch Mahal situated 1315 15b5cc6cfe4d2b4197774e312
5b5cc6cfe4d2b4197774e312- 1Fatehpur Sikritrue
- 2Gandhinagarfalse
- 3Allahabadfalse
- 4Varanasifalse
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Answer : 1. "Fatehpur Sikri"
Explanation :
Answer: A) Fatehpur Sikri Explanation: Fatehpur Sikri in Uttar Pradesh.
Q: Manju borrows Rs.5000 for 2 years at 4% p.a. simple interest from Sudha. She immediately lends it to another person at 6 1⁄4% p.a for 2 years. Find her gain in the transaction per year. 1314 05b5cc6cfe4d2b4197774e332
5b5cc6cfe4d2b4197774e332- 1Rs. 101false
- 2Rs. 98.5false
- 3Rs. 124.3false
- 4Rs. 112.5true
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Answer : 4. "Rs. 112.5"
Explanation :
Answer: D) Rs. 112.5 Explanation: Manju borrows Rs. 5000 for 2 years at 4% p.a. simple interest She also lends it at 6 1⁄4% p.a for 2 years => Total Gain = 6 1/4% − 4% = 2 1/4% So her gain in the transaction for 1 year = The simple interest she gets for Rs.5000 for 1 year at 2 1⁄4% per annum = PTR100=5000×94×1100 = Rs. 112.5/ year.

