IIT JEE Practice Question and Answer
8Q: A man spend Rs. 810 in buying trouser at Rs. 70 each and shirt at Rs. 30 each. What will be the ratio of trouser and shirt when the maximum number of trouser is purchased ? 3078 05b5cc731e4d2b4197774f7b5
5b5cc731e4d2b4197774f7b5- 11:3false
- 22:1false
- 33:2true
- 42:3false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "3:2"
Explanation :
Answer: C) 3:2 Explanation: Let us assume S as number of shirts and T as number of trousersGiven that each trouser cost = Rs.70 and that of shirt = Rs.30Therefore, 70 T + 30 S = 810=> 7T + 3S = 81......(1)T = ( 81 - 3S )/7 We need to find the least value of S which will make (81 - 3S) divisible by 7 to get maximum value of TSimplifying by taking 3 as common factor i.e, 3(27-S) / 7In the above equation least value of S as 6 so that 27- 3S becomes divisible by 7 Hence T = (81-3xS)/7 = (81-3x6)/7 = 63/7 = 9 Hence for S, put T in eq(1), we getS = 81-7(9)/3 = 81-63 / 3 = 18/3 = 6.The ratio of T:S = 9:6 = 3:2.
Q: From the following pairs, find the one which is correctly matched? 3077 05b5cc6bee4d2b4197774d960
5b5cc6bee4d2b4197774d960- 1Scurvy- Thiaminefalse
- 2Tuberculosis- ATSfalse
- 3Tetanus- BCGfalse
- 4Malaria- Chloroquinetrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Malaria- Chloroquine"
Explanation :
Answer: D) Malaria- Chloroquine Explanation: Chloroquine is a medication used to prevent and to treat malaria.
Q: The main function of a school board is to 3077 05b5cc651e4d2b4197774bd2d
5b5cc651e4d2b4197774bd2d- 1manage public schools in accordance with state and federal law.true
- 2raise revenue for public schools through local taxes and fees.false
- 3propose and legislate state laws that affect the public schools.false
- 4serve as a school’s principals, teachers, and administrators.false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "manage public schools in accordance with state and federal law."
Explanation :
Answer: A) manage public schools in accordance with state and federal law. Explanation: The main function of a school board is to manage public schools in accordance with state and federal law. The functions of the school board of a public school are: • to establish strategic direction and priorities for the school. • to monitor and review school performance and to report on it to the Director-General, parents of students at the school and staff. • to develop, maintain and review curriculum for the school. • to develop and review education policies at the school. • to establish budgetary policies for the school and approve the school budget. • to establish policies for the efficient and effective use of school assets and the management of financial risk. • to develop relationships between the school and the community and between the school and community organisations. • to make recommendations to the Director-General on issue affecting the school and to give effect to the Director-General’s directions. • to encourage parent participation in their children’s learning; and • to exercise any other function given to the board under this Act or any otherTerritory law.
Q: Find the next number in the sequence? 28, 16, 28, 76, 274 3069 05b5cc696e4d2b4197774c59f
5b5cc696e4d2b4197774c59f- 11233false
- 21243true
- 31256false
- 41276false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "1243"
Explanation :
Answer: B) 1243 Explanation: Given number sequence is 28, 16, 28, 76, 274 Here the sequence follows a pattern that 28 28 x 0.5 + 2 = 14 + 2 = 16 16 x 1.5 + 4 = 24 + 4 = 28 28 x 2.5 + 6 = 70 + 6 = 76 76 x 3.5 + 8 = 266 + 8 = 274 274 x 4.5 + 10 = 1233 + 10 = 1243 Hence, the next number in the given number sequence is 1243.
Q: A thief steals half the total number of loaves of bread plus 1/2 loaf from a bakery. A second thief steals half the remaining number of loaves plus 1/2 loaf and so on. After the 5th thief has stolen there are no more loaves left in the bakery. What was the total number of loaves did the bakery have at the beginning ? 3067 05b5cc70ee4d2b4197774f33c
5b5cc70ee4d2b4197774f33c- 121false
- 211false
- 317false
- 431true
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "31"
Explanation :
Answer: D) 31 Explanation: Let y be the total number of loavesa be the remaining loaves after 1st thiefb be the remaining loaves after 2nd thiefand c, d..so on after 3 and 4 the = 0 be the remaining loaves after 5th thief a = y - (y/2 + 1/2)= y/2 - 1/2 b = a - (a/2 + 1/2)= a/2 - 1/2 c = b - (b/2 + 1/2)= b/2 - 1/2 d = c - (c/2 + 1/2)= c/2 - 1/2 e = d - (d/2 + 1/2)= d/2 - 1/2we know that, e = 0,thus by substitution, we getd = 1c = 3b = 7a = 15y = 31Therefore total number of bread loaves in bakery was 31.
Q: What is the main component of biogas and natural gas? 3065 05b5cc69ce4d2b4197774c825
5b5cc69ce4d2b4197774c825- 1Carbon dioxidefalse
- 2Butanefalse
- 3Hydrogen Sulphidefalse
- 4Methanetrue
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "Methane"
Explanation :
Answer: D) Methane Explanation: Methane is the main component of biogas and natural gas.
Q: A check returned by the bank marked nsf means 3064 05b5cc694e4d2b4197774c48e
5b5cc694e4d2b4197774c48e- 1Cheque has been forgedfalse
- 2Cheque can't be cashed being illegalfalse
- 3There are not sufficient funds in your accountrue
- 4Bank can't verify your identityfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "There are not sufficient funds in your accoun"
Explanation :
Answer: C) There are not sufficient funds in your accoun Explanation: NSF means - Not Sufficient Funds.
Q: When water freezes its density 3050 05b5cc6a1e4d2b4197774cb08
5b5cc6a1e4d2b4197774cb08- 1decreasestrue
- 2remains constantfalse
- 3increasesfalse
- 4become zerofalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "decreases"
Explanation :
Answer: A) decreases Explanation: When water freezes its density decreases. Water at ordinary temperatures contracts and increases in density as it is cooled, like most substances. But at about 4°C it reaches a maximum density and then decreases in density as it approaches the freezing point.