IIT JEE Practice Question and Answer
8Q: Two boys are playing on a ground. Both the boys are less than 10 years old. Age of the younger boy is equal to the cube root of the product of the age of the two boys. If we place the digit representing the age of the younger boy to the left of the digit representing the age of the elder boy, we get the age of the father of the younger boy. Similarly, we place the digit representing the age of the elder boy to the left of the digit representing the age of the younger boy and divide the figure by 2, we get the age of the mother of the younger boy. The mother of the younger boy is younger than his father by 3 years. Then, what are the ages of elder and younger boys ? 4294 05b5cc73ae4d2b4197774f8ce
5b5cc73ae4d2b4197774f8ce- 1E = 15 & Y = 3false
- 2E = 14 & Y = 12false
- 3E = 40 & Y = 22false
- 4E = 4 & Y = 2true
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Answer : 4. "E = 4 & Y = 2"
Explanation :
Answer: D) E = 4 & Y = 2 Explanation: Let the the age of the elder boy = E Let the the age of the younger boy = Y Given that Y = cube root of EY => Y3 = EY => E = Y2 .....(1)By the condition of number replacement the age of the father is YE The Mother's age = EY/2 But she is 3 years less than father => EY/2 + 3 = YE2YE = EY + 6 ......(2) Then now from the given options we can identify which satisfies the all the conditions. Here Y =2 and E = 4 satisfies all the conditions.
Q: Which of the following is the primary purpose of the DSM? 4292 05b5cc68be4d2b4197774c36f
5b5cc68be4d2b4197774c36f- 1Understanding the causes of mental disordersfalse
- 2Placement of mental disorders in appropriate cultural contextfalse
- 3Diagnosis of mental disorderstrue
- 4Selection of appropriate psychological therapies for mental disordersfalse
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Answer : 3. "Diagnosis of mental disorders"
Explanation :
Answer: C) Diagnosis of mental disorders Explanation: The DSM is the Diagnostic and Statistical Manual of Mental Disorders; it is currently in its fifth edition. The DSM is published by the APA, American Psychiatric Association. It is a crucial resource in the fields of psychology and psychiatry.
Q: An exhibition was conducted for 4 weeks. The number of tickets sold in 2nd workweek was increased by 20% and increased by 16% in the 3rd workweek but decreased by 20% in the 4th workweek. Find the number of tickets sold in the beginning, if 1392 tickets were sold in the last week ? 4261 05b5cc74fe4d2b4197774faea
5b5cc74fe4d2b4197774faea- 11124false
- 21420false
- 31345false
- 41250true
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Answer : 4. "1250"
Explanation :
Answer: D) 1250 Explanation: Let initially 'X' ticket has been sold.So now in 2nd week 20% increases, so=> X x 120/100In 3rd week 16% increases, so=> X x (120/100) x (116/100)In 4th week 20% decrease, so=> X x (120/100) x (116/100) x (80/100) = 1392X = 1250.
Q: Excel displays the current cell address in the 4258 05b5cc655e4d2b4197774bd44
5b5cc655e4d2b4197774bd44- 1Title Barfalse
- 2Name Boxtrue
- 3Status Barfalse
- 4Formula barfalse
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Answer : 2. "Name Box"
Explanation :
Answer: B) Name Box Explanation:
Q: In a certain encryption pattern, HARD is coded as 1357 and SOFT is coded as 2468, What will 21448 stand for ? 4255 05b5cc745e4d2b4197774fa3b
5b5cc745e4d2b4197774fa3b- 1SHAFTfalse
- 2SHOOTtrue
- 3RAFTSfalse
- 4ROOTSfalse
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Answer : 2. "SHOOT"
Explanation :
Answer: B) SHOOT Explanation: AS HARD is coded as "1357" and SOFT is coded as "2468"So H is coded as 1, A as 3, R as 5, D as 7and S as 2, O as 4, F as 6, T as 8 Now in 21448, go number by number2 is the code for S1 is the code for H4 is the code for Oand 8 is the code for T hence, 21448 will stand for SHOOT
Q: Who set up the world's first floating ATM ? 4250 05b5cc711e4d2b4197774f3f5
5b5cc711e4d2b4197774f3f5- 1Bank of Americafalse
- 2Barclays Bankfalse
- 3Axis Bankfalse
- 4State Bank of Indiatrue
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Answer : 4. "State Bank of India"
Explanation :
Answer: D) State Bank of India Explanation: India's banking behemoth -- the State Bank of India -- has set up the world's first-ever floating ATM on a boat in Kerala. The boat with the ATM on board will berth at jetties in Kerala's huge backwaters through which thousands of people travel daily.
Q: What word in the English language is always spelled incorrectly? 4240 05b5cc698e4d2b4197774c631
5b5cc698e4d2b4197774c631- 1Schezwanfalse
- 2Yorkerfalse
- 3Incorrectlytrue
- 4Psycologicallyfalse
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Answer : 3. "Incorrectly"
Explanation :
Answer: C) Incorrectly Explanation: INCORRECTLY is the only English word which is always spelled incorrectly.
Q: A group of men can complete a job in K hours. After every 4 hours, half the number of men working at that point of time leave the job. Continuing this way if the job is finished in 16 hours, what is the value of K ? 4237 05b5cc73ae4d2b4197774f8d8
5b5cc73ae4d2b4197774f8d8- 17 hrsfalse
- 27.5 hrstrue
- 38 hrsfalse
- 48.25 hrsfalse
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Answer : 2. "7.5 hrs"
Explanation :
Answer: B) 7.5 hrs Explanation: Let there are L men job requires LK man hours. job completed in first 4 hrs = L x 4 = 4L job completed in next 4 hrs = 4 x L/2 = 2L job completed in next 4 hrs = 4 x L/4 = L job completed in last 4 hrs = 4 x L/8 = L/2 4L + 2L + L + L/2 = KL K = 7+1/2 = 7.5 hours.