IIT JEE Practice Question and Answer
8Q: A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in ? 1714 05b5cc6e5e4d2b4197774ed2e
5b5cc6e5e4d2b4197774ed2e- 120 hrstrue
- 228 hrsfalse
- 336 hrsfalse
- 440 hrsfalse
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Answer : 1. "20 hrs"
Explanation :
Answer: A) 20 hrs Explanation: 1/8 - 1/x = 1/10 => x = 40 hrs
Q: Why did charles babbage invent the computer? 1714 05b5cc63de4d2b4197774bafe
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Answer :
Explanation :
Charles Babbage, the father of computer, invented the first general-purpose computer in an effort to prevent the mathematical errors that were prevalent in the human-calculated mathematics of his time.
Q: What is an example of an inflation risk? 1714 05b5cc642e4d2b4197774bb5c
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Answer :
Explanation :
Inflation risk, also called purchasing power risk, is the chance that the cash flows from an investment won't be worth as much in the future because of changes in purchasing power due to inflation. HOW IT WORKS (EXAMPLE): For example, $1,000,000 in bonds with a 10% coupon might generate enough interest payments for a retiree to live on, but with an annual 3% inflation rate, every $1,000 produced by the portfolio will only be worth $970 next year and about $940 the year after that. The rising inflation means that the interest payments have less and less purchasing power. And the principal, when it is repaid after several years, will buy substantially less than it did when the investor first purchased the bonds.
Q: Ramesh spent Rs. 38460 on the renovation of his home, Rs. 24468 on buying furniture and remaining 28% of the total amount he had as cash with him. What was the total amount ? 1714 05b5cc6c0e4d2b4197774db00
5b5cc6c0e4d2b4197774db00- 187400true
- 292520false
- 388470false
- 490150false
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Answer : 1. "87400"
Explanation :
Answer: A) 87400 Explanation: Let X be the total amount with Ramesh Given 28% of X = Cash remaining => Amount spent = 72% of X = 38460 + 24468 = 62928 => 72% of X = 62928 => X = ? => X = 87400
Q: Modem is used mostly for ? 1714 05b5cc69be4d2b4197774c7c8
5b5cc69be4d2b4197774c7c8- 1A modern empty memory modulesfalse
- 2Connecting to internettrue
- 3Mostly for file systemfalse
- 4All the abovefalse
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Answer : 2. "Connecting to internet"
Explanation :
Answer: B) Connecting to internet Explanation: A modem is nothing but short for Modulator and Demodulator. It is used mostly for connecting to the internet. A modem is a device or program that enables a computer to transmit data over, for example, telephone or cable lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves.
Q: A mixture contains 25% milk and rest water. What percent of this mixture must taken out and replaced with milk so that in mixture milk and water may become equal. 1713 05b5cc6b6e4d2b4197774d59e
5b5cc6b6e4d2b4197774d59e- 131.8%false
- 231%false
- 333.33%true
- 429.85%false
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Answer : 3. "33.33%"
Explanation :
Answer: C) 33.33% Explanation: Now, take percentage of milk and applying mixture rule 25 100 50 50 25 = 2 : 1 Hence required answer = 1/3 or 33.33%
Q: Swetha when get married to Sudeer her age was 3/4 th of her husband's age. After 12 years her age became 5/6 th of her husband's age. Then what's the age of Swetha when she got married ? 1712 05b5cc71be4d2b4197774f55e
5b5cc71be4d2b4197774f55e- 118 yearstrue
- 221 yearsfalse
- 323 yearsfalse
- 417 yearsfalse
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Answer : 1. "18 years"
Explanation :
Answer: A) 18 years Explanation: At the time of marriage, let Sudeer's age be 4x, then Swetha's age is 3x12 years after:Age of Sudeer = 4x+12Age of Swetha = 3x+12Now the equation is 3x+12=5/6(4x+12)Solving equation we get x=6Hence Swetha got married at the age of 18.
Q: Simplify the following and find the value of ? 13 of ? + 47 of 114 of 539 = 31% of 2000 1712 05b5cc6ace4d2b4197774d091
5b5cc6ace4d2b4197774d091- 11134true
- 21237false
- 31187false
- 41249false
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Answer : 1. "1134"
Explanation :
Answer: A) 1134 Explanation: 13 x ? + 47 x 114 x 539 = 31100 x 2000? = 378 x 3? = 1134