IIT JEE Practice Question and Answer
8Q: The former cricketer/cricketers who was/were inducted into the ICC Cricket Hall of Fame 2018 in Dublin, Ireland 1547 05b5cc62ae4d2b4197774b8ab
5b5cc62ae4d2b4197774b8ab- 1Claire Taylorfalse
- 2Ricky Pontingfalse
- 3Rahul Dravidfalse
- 4All of the abovetrue
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Answer : 4. "All of the above"
Explanation :
Answer: D) All of the above Explanation: Former captains Rahul Dravid of India, Ricky Ponting of Australia and retired England Women wicketkeeper-batter Claire Taylor were inducted into the ICC Cricket Hall of Fame 2018 during a glittering ceremony in Dublin, Ireland. Former Team India captain Rahul Dravid has become the fifth Indian cricketer after Anil Kumble, Sunil Gavaskar, Bishan Singh Bedi and Kapil Dev to be inducted into the ICC Hall of Fame.
Q: A is three times as old as B. C was twice-as old as A four years ago. In four years' time, A will be 31. What are the present ages of B and C ? 1547 05b5cc720e4d2b4197774f5ea
5b5cc720e4d2b4197774f5ea- 145, 10false
- 210, 50false
- 39, 50true
- 450, 15false
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Answer : 3. "9, 50"
Explanation :
Answer: C) 9, 50 Explanation: Let the age of A = A, B = B and C = C From given A = 3B 4 years ago, C-4 = 2(A-4); After 4 years A + 4 = 31; A = 27;sub in above B, we get B = 9 C = 2(27 - 4) + 4 = 46 + 4 = 50 Hence B = 9yrs and C = 50yrs.
Q: Prasanna invested certain amount in three different schemes X, Y and Z with the rate of interest 10% p.a, 12% p.a and 15% p.a respectively. If the total interest accrued in one year was Rs. 3200 and the amount invested in Scheme Z was 150% of the amount invested in Scheme X and 240% of the amount invested in Scheme Y, what was the amount invested in Scheme Y by Prasanna ? 1546 05b5cc6c5e4d2b4197774ddb9
5b5cc6c5e4d2b4197774ddb9- 1Rs.6000false
- 2Rs.4500false
- 3Rs.7500false
- 4Rs.5000true
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Answer : 4. "Rs.5000"
Explanation :
Answer: D) Rs.5000 Explanation: Let a, b and c be the amounts invested in schemes X, Y and Z respectively. Then, As we know: Simple interest (S.I.) = PTR/100 (a × 10 × 1/100) + (b × 12 × 1/100) + (c × 15 × 1/100) = 3200 = 10a + 12b + 15c = 320000 .........(1) Now, c = 240% of b = 12b/5 .........(2) And, c = 150% of a = 3a/2 => a = 2/3 c = (2 × 12)b/(3 × 5) = 8b/5 .......(3) From (1), (2) and (3), we have 16b + 12b + 36b = 320000 => 64b = 320000 => b = 5000 ∴ Sum invested in Scheme Y = Rs.5000.
Q: The price of an article has been reduced by 35%. In order to restore the original price the new price must be increased by ? 1546 05b5cc6dfe4d2b4197774eae4
5b5cc6dfe4d2b4197774eae4- 151.8 %false
- 249.25 %false
- 347.2 %false
- 453.84 %true
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Answer : 4. "53.84 %"
Explanation :
Answer: D) 53.84 % Explanation: 100 65 -------65 ------- 35100 ------ ? => 53.84 %
Q: Math Logic Challenge 1546 05b5cc6d3e4d2b4197774e4b4
5b5cc6d3e4d2b4197774e4b4- 123false
- 226true
- 313false
- 429false
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Answer : 2. "26"
Explanation :
Answer: B) 26 Explanation: Let the integer be x. Then, x2-20x = 156 (x + 6)(x - 26) = 0 x = 26 The integer is 26.
Q: Which of these illustrates the Secondary Structure of a Protein? 1545 05b5cc6abe4d2b4197774d02a
5b5cc6abe4d2b4197774d02a- 1Afalse
- 2Btrue
- 3Cfalse
- 4Dfalse
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Answer : 2. "B"
Explanation :
Answer: B) B Explanation: The Secondary Structure of a Protein is option B) The Secondary Structure of a Protein results from Hydrogen Bonds.
Q: 100 percent of which number is 20? 1545 05b5cc6b0e4d2b4197774d28d
5b5cc6b0e4d2b4197774d28d- 1100false
- 2500false
- 320true
- 40false
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Answer : 3. "20"
Explanation :
Answer: C) 20 Explanation: Let the rquired number be 'P' According to the question, 100 x P100 = 20=> P = 20 x 100100 = 20 Hence, 100 percent of the number 20 is 20. Now, you can also try for 20 percent of what number is 100 20 x P100 = 100=> P = 100 x 10020 = 500=> P = 500 Hence, 20 percent of the number 500 is 100.
Q: The area of a square is 1024 sq.cm. What is the ratio of the length to the breadth of a rectangle whose length is twice the side of the square and breadth is 12 cm less than the side of this square ? 1544 05b5cc72ce4d2b4197774f76e
5b5cc72ce4d2b4197774f76e- 114:9false
- 213:12false
- 316:5true
- 417:13false
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Answer : 3. "16:5"
Explanation :
Answer: C) 16:5 Explanation: Area of a square SxS = 1024 => S = 32 cmLength of the rectangle = 32x2 cm = 64 cmBreadth of the rectangle = 32 - 12 = 20 cmRequired ratio = 64 : 20 = 16 : 5