IIT JEE Practice Question and Answer
8Q: Arun has certain number of books. It is not less than 15 and not more than 30. If he wants to give these books equally to 2 of his friends, then 1 book will remain. If he wants to give these books equally to 3 of his friends, then 2 books will remain. If he wants to give these books equally to 4 of his friends, then 3 books will remain. What is the number of books he had ? 1524 05b5cc718e4d2b4197774f4a4
5b5cc718e4d2b4197774f4a4- 119false
- 223true
- 317false
- 415false
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Answer : 2. "23"
Explanation :
Answer: B) 23 Explanation: If he wants to give these books equally to 2 of his friends, then 1 book will remain, it means possible number of books = 15,17,19,21,23,25,27,29If he wants to give these books equally to 3 of his friends, then 2 books will remain, it means possible number of books = 17,20,23,26,29If he wants to give these books equally to 4 of his friends, then 3 book will remain, it means possible number of books = 15,19,23,27common number is only 23 so it will be answer
Q: Rajeev works in the security section of a bank. Everybody in the company is either an IT person or a finance person or both. The assignment that rambo is currently working on has five people from finance and three people from IT,including him. Of the 26 finance people in his department, a total of 16 are in his section. Of the 18 IT people in his department, 10 are not in Rajeev section. There is nobody in Rajeev section who is both a finance person and an IT person. Fifteen people in his department do not belong to his section. Questions : 1)How many IT people are there in Rajeev's department who are not a finance person and are not in Rajeev's section ? 1254 05b5cc718e4d2b4197774f49f
5b5cc718e4d2b4197774f49f- 11false
- 23false
- 35false
- 48 2)what number finance people in Rajeev's department are not in his section?false
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Answer :
Explanation :
Finance person in his department = 26IT persons in his department = 18Finance person in his section = 16IT persons in his section = 8Total in his section = 16+8 = 24Total people in his depatment = 26+18 = 44only 15 people in his dept are not in his secand 44-24 = 20so 20-15 = 5 people belong to both finance and IT Answer 1) is 'C'. IT persons in his department = 18(total IT) - 8(section) - 5(both) = 5 Answer 2) is 'B' Finance persons not in his section = 26 - 16 = 10
Q: The sum of the ages of 5 children born at the intervals of 3 years each is 50 years. What is the age og the youngest child ? 1162 05b5cc718e4d2b4197774f49a
5b5cc718e4d2b4197774f49a- 18 yrsfalse
- 216 yrsfalse
- 36 yrsfalse
- 44 yrstrue
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Answer : 4. "4 yrs"
Explanation :
Answer: D) 4 yrs Explanation: Let the age of the youngest child is 'X' years.Then the child elder than the yongest is 'X + 3' yrsSince each have 3yrs difference upto 5 childrenAnd given that=> X + X+3 + X+6 + X+9 + X+12 = 50=> 5X + 30 = 50=> X = 4 yrs.
Q: Choose the correct order 1) is 2) at 3) TV 4) film 5) midnight 6) a 7) on 8) great 9) There 1457 05b5cc718e4d2b4197774f495
5b5cc718e4d2b4197774f495- 19, 1, 6, 8, 7, 4, 3, 2, 5false
- 29, 1, 6, 8, 4, 7, 3, 5, 3false
- 39, 1, 6, 8, 4, 7, 3, 2, 5true
- 49, 6, 1, 8, 4, 7, 3, 2, 5false
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Answer : 3. "9, 1, 6, 8, 4, 7, 3, 2, 5"
Explanation :
Answer: C) 9, 1, 6, 8, 4, 7, 3, 2, 5 Explanation: There is a great film on tv at midnight.
Q: If 4 circles of equal radius are drawn with vertices of a square as the centre , the side of the square being 7 cm, find the area of the circles outside the square ? 1203 05b5cc718e4d2b4197774f490
5b5cc718e4d2b4197774f490- 1119.21 sq cmfalse
- 2115.395 sq cmtrue
- 3104.214 sq cmfalse
- 4111.241 sq cmfalse
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Answer : 2. "115.395 sq cm"
Explanation :
Answer: B) 115.395 sq cm Explanation: Because each vertice of the square is the center of a circle(1/4) part of the total area of each circle inside of the square.(3/4) part of the total area of each circle outside of the square.Thus total area outside the square is 434×227×3.5×3.5 = 115.3955 sq cm.
Q: World Consumer Rights Day is observed globally on ___________. 1172 05b5cc718e4d2b4197774f486
5b5cc718e4d2b4197774f486- 115 Marchtrue
- 225 Marchfalse
- 314 Marchfalse
- 425 Aprilfalse
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Answer : 1. "15 March"
Explanation :
Answer: A) 15 March Explanation: World Consumer Rights Day is being observed globally on 15 March which is an awareness day for the consumers.
Q: A person in a bet 40 shots taken. 50p for a hit, 10p for a miss.(he have to give). Finally he has Rs.5. How many hits he have ? 1391 05b5cc718e4d2b4197774f47c
5b5cc718e4d2b4197774f47c- 115true
- 220false
- 325false
- 430false
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Answer : 1. "15"
Explanation :
Answer: A) 15 Explanation: Let number of hit shots be 'X'Let number of miss shots be 'Y'Given X + Y = 40....(1)50X - 10Y = 500.....(2)Solving 1 and 2, we getX = 15 and Y = 25Therefore, number of hits = 15
Q: There are five bags. In the first bag we put some fruits. Each bag the number of fruits is reduced by 1/4. The last bag contains 4. Then the number of fruits in the first bag is ? 892 05b5cc715e4d2b4197774f477
5b5cc715e4d2b4197774f477- 12596false
- 21024true
- 3256false
- 464false
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Answer : 2. "1024"
Explanation :
Answer: B) 1024 Explanation: Fruits reduced by 1/4.Total no. of bags N = 5Formula to find no. of fruits in 1st bag = 4^nLast Bag = 4 fruits.That means, 4th bag = 4 x 4 = 16 fruits3rd bag = 16 x 4 = 64 fruits2nd bag = 64 x 4 = 256 fruits1st bag = 256 x 4= 1024 fruits.