IIT JEE Practice Question and Answer
8Q: Find the Odd One Out of the following Number Series? 3, 14, 36, 67, 113, 168 4342 05b5cc6b1e4d2b4197774d34b
5b5cc6b1e4d2b4197774d34b- 114false
- 236false
- 367true
- 4113false
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Answer : 3. "67"
Explanation :
Answer: C) 67 Explanation: Here the given number series is 3, 14, 36, 67, 113, 168 It follows a pattern that 3 3 + 1 x 11 = 3 + 11 = 14 14 + 2 x 11 = 14 + 22 = 36 36 + 3 x 11 = 36 + 33 = 69 69 + 4 x 11 = 69 + 44 = 113 113 + 5 x 11 = 113 + 55 = 168 Hence, the wrong number is 67.
Q: A son and father goes for boating in river upstream . After rowing for 1 mile son notices the hat of his father falling in the river. After 5 min he tells his father that his hat has fallen. So they turn round and are able to pick the hat at the point from where they began boating after 5min. Find the speed of river in miles/hours ? 4337 05b5cc711e4d2b4197774f3d7
5b5cc711e4d2b4197774f3d7- 14 mile/hrfalse
- 26 mile/hrtrue
- 32 mile/hrfalse
- 45 mile/hrfalse
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Answer : 2. "6 mile/hr"
Explanation :
Answer: B) 6 mile/hr Explanation: Let the speed of river and boat be 'r' m/min and 'b' m/min.so relative speed in upstream (b-r)m/min and in downstream (b+r)m/min.Now in upstream distnce covered in 5 min is 5(b-r)milesso total distnce covered => 1 + 5(b-r)miles in upstreamIn downstream distance covered in 5min is 5(b+r)miles Now 1 + 5(b-r) = 5(b+r)1+5b-5r = 5b+5r1 = 10rr = 1/10 mile/min => 6 mile/hr.
Q: Resistance of human body in dry condition 4332 05b5cc64de4d2b4197774bc84
5b5cc64de4d2b4197774bc84- 110 ohmfalse
- 21000 ohmfalse
- 310000 ohmfalse
- 4100000 ohmtrue
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Answer : 4. "100000 ohm"
Explanation :
Answer: D) 100000 ohm Explanation: Under dry conditions, the resistance offered by the human body may be as high as 100,000(10^5) Ohms. Depending on the person, a rough value for the internal resistance of the human body is 300-1,000 Ohms. The skin's resistance is much lower if it is wet or burnt/blistered. There are a lot of factors involved and not every person has the same electrical resistance. For instance, men tend to have lower resistance than women. Within the body, the tissues with the greatest resistance are bone and fat - nerves and muscle have the least resistance.
Q: When I was married 10 years ago my wife is the 6th member of the family. Today my father died and a baby born to me.The average age of my family during my marriage is same as today. What is the age of Father when he died ? 4330 05b5cc745e4d2b4197774fa18
5b5cc745e4d2b4197774fa18- 150 yrsfalse
- 260 yrstrue
- 370 yrsfalse
- 465 yrsfalse
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Answer : 2. "60 yrs"
Explanation :
Answer: B) 60 yrs Explanation: Let the Father be x years when he died Average Age 10 years ago be A Total Age 10 years ago = 6*A Total Age after 10 years(Just before father's Death) = 6A + 6*10 = 6A + 60 Father Died and Baby was born => the Total number of people in the family is Same (6) Baby born today so age of baby = 0 (6A +60 - x)/6 = 6A/6 => A + 10 -(x/6) = A => x/6 = 10 => x = 60 Therefore we can conclude that the father was 60 years old when he died.
Q: 21st letter of the alphabet is a Consonant. 4330 05b5cc6a3e4d2b4197774cc3e
5b5cc6a3e4d2b4197774cc3e- 1TRUEfalse
- 2FALSEtrue
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Answer : 2. "FALSE"
Explanation :
Answer: B) FALSE Explanation: We know there are 26 alphabets in English. The 21st letter in the alphabet is 'U'. We have 5 vowels and 21 consonants. Vowels :: A, E, I, O, U. U is not consonant and is a vowel. Hence, the given statement that 21st letter in the alphabet i.e, U is consonant is a FALSE.
Q: Cup : Lip :: Bird : ? 4318 05b5cc69be4d2b4197774c7ee
5b5cc69be4d2b4197774c7ee- 1Grasstrue
- 2Forestfalse
- 3Beakfalse
- 4Bushfalse
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Answer : 1. "Grass"
Explanation :
Answer: A) Grass Explanation: Cup is used to drink something with the help of lips. Similarly, birds collect grass with the help of beak to make her nest. Hence, Cup : Lip :: Bird : Grass.
Q: In order to maximize his gain, a shopping mall owner decides to reduce the price of electronics goods by 20% and as a result of this, the sales of electronics increase by 40%. If, as a result of these changes, he is able to increase his weekly collection by Rs. 1,05,000, find by what value did the gross collection increase per day? 4296 05b5cc6aee4d2b4197774d188
5b5cc6aee4d2b4197774d188- 1Rs. 14400false
- 2Rs. 14600false
- 3Rs. 14800false
- 4Rs. 15000true
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Answer : 4. "Rs. 15000"
Explanation :
Answer: D) Rs. 15000 Explanation: It won't requires that much solving. Here given the increase in weekly collection by Rs. 1,05,000 That is this increase denotes for all 7 days. => Gross Collection increase per day = Rs. 1,05,0007 = Rs. 15,000 Hence, the gross collection increase per day = Rs. 15,000.
Q: Which of the following is not a function of the Control Unit? 4284 05b5cc6aae4d2b4197774cf93
5b5cc6aae4d2b4197774cf93- 1Interpret instructionsfalse
- 2Read instructionstrue
- 3Execute instructionsfalse
- 4Direct operationsfalse
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Answer : 2. "Read instructions"
Explanation :
Answer: B) Read instructions Explanation: Control Unit can perform the functions Interpret instructions, Execute instructions and Direct operations. But Reading instructions is not a function of the Control Unit.