Your Answer : (Not Answered)

Correct Answer : D

Manju joined after 6 months.

Profits are shared in the ratio of capital multiplied by time. Equal shares mean equal products. Bharati invested for 12 months; let Manju invest for \(m\) months:

\[ \begin{aligned} 18000 \times 12 &= 36000 \times m \\ m &= 6 \end{aligned} \]

Manju's money was at work for 6 months, so she joined 12 - 6 = 6 months after the start. Joining after 10, 5 or 8 months would leave her capital working for 2, 7 or 4 months, giving products of 72,000, 252,000 or 144,000 against Bharati's 216,000.

Your Answer : (Not Answered)

Correct Answer : B

She got 3 the maximum number of times.

Counting each result in 5, 3, 6, 6, 1, 4, 5, 3, 3, 2:

• 3 appears three times.
• 5 and 6 appear twice each.
• 1, 2 and 4 appear once each.

So 3 is the most frequent result, the mode of the data. The options 6 and 5 occur only twice, and 1 only once.

Your Answer : (Not Answered)

Correct Answer : A

We use the Pythagorean theorem for a right-angled triangle: \(a^2 + b^2 = c^2\), where a and b are the legs and c is the hypotenuse.

\(6^2 + 8^2 = c^2\)

\(36 + 64 = c^2\)

\(100 = c^2\)

\(c = \sqrt{100} = 10\) cm.

Your Answer : (Not Answered)

Correct Answer : B

Let Rahul's present age is \(x\) years.

Then \(x+15=5(x-5)\)

\(\Rightarrow\) \(4x=40\)

\(\Rightarrow\) \(x=10\)

Your Answer : (Not Answered)

Correct Answer : C

The correct choice is bridges on Q, R, T, and V.

Each river segment separates two zones, so a bridge on it joins those two zones:

• P: Z1-Z2; R: Z2-Z3; Q: Z1-Z3; S: Z1-Z5;
• T: Z3-Z5; V: Z3-Z4; U: Z4-Z5.

Connecting 5 zones needs at least 4 bridges, the edges of a spanning tree. Q, R, T and V join Z1, Z2, Z5 and Z4 each directly to Z3, so all five zones are connected with 4 bridges.

Three bridges (P, Q, T) cannot connect five zones. P, Q, S and T connect Z1, Z2, Z3 and Z5 but leave Z4 cut off, because neither U nor V is bridged. P, Q, S, U and V connects everything but uses 5 bridges, one more than needed.

Your Answer : (Not Answered)

Correct Answer : B

It is inn.

An inn is a house providing lodging. In is the preposition, and the two are pronounced identically.

Your Answer : (Not Answered)

Correct Answer : B

A byte has 8 bits.

A bit is a single binary digit, 0 or 1. A byte, the basic unit of computer memory and storage, is a group of eight bits, so it can represent \(2^{8} = 256\) different values, enough to encode one character in standard character sets such as ASCII and its extensions.

Four bits make a nibble (half a byte). Sixteen and thirty-two bits are common word sizes for processors, that is two and four bytes, not one.

Your Answer : (Not Answered)

Correct Answer : B

Correct answer: Macro virus

A macro virus is written in the macro language of an application - Word or Excel - so it travels inside documents and runs when the application opens them. A boot virus infects the boot sector and a file virus an executable.

Your Answer : (Not Answered)

Correct Answer : D

Correct answer: Peripheral Component Interconnect

PCI is Peripheral Component Interconnect, the bus that replaced ISA for connecting expansion cards.

Your Answer : (Not Answered)

Correct Answer : A

Correct answer: Enter

Enter commits what has been typed and moves to the next cell. Ctrl + Enter commits it to every cell of a selection at once, and Esc abandons it.

Your Answer : (Not Answered)

Correct Answer : C

The Hornbill Festival is held in Nagaland.

The Government of Nagaland organises the Hornbill Festival from 1 to 10 December every year at the Kisama Heritage Village near Kohima. Begun in 2000, it brings all the Naga tribes together to show their dances, music, crafts, sports and food, and it is named after the hornbill, a bird that features widely in Naga folklore.

Sikkim and Manipur hold their own festivals but not this one, so 'None of these' is also wrong.

Your Answer : (Not Answered)

Correct Answer : B

The incorrect statement is Slaked lime slowly creates a layer of calcium nitrate on the walls during white washing.

The layer formed is calcium carbonate, not calcium nitrate. Slaked lime (calcium hydroxide) applied to the wall reacts slowly with carbon dioxide in the air:

\[ \mathrm{Ca(OH)_2 + CO_2 \rightarrow CaCO_3 + H_2O} \]

which gives the shiny white finish a few days after whitewashing. Air supplies no nitrate for this reaction.

The other statements are correct. Calcium oxide (quick lime) reacts vigorously with water, releasing heat, to give slaked lime. Silver chloride turns grey in sunlight as it decomposes to silver and chlorine, which is why it is used in black and white photography. Decomposition reactions need energy, as heat, light or electricity, to break the reactants down.

Your Answer : (Not Answered)

Correct Answer : C

About 7 weeks are needed to replace the body's reserve of red corpuscles after giving a pint of blood.

The plasma volume is restored within a day or two, and the red cell count within a few weeks, but the iron stores that back it up take considerably longer - which is why donors are asked to wait about three months.

Your Answer : (Not Answered)

Correct Answer : B

The first cricket Test match was played at Melbourne in March 1877, between Australia and England. Australia won by 45 runs.

Charles Bannerman of Australia scored the first Test century, 165 not out, and faced the first ball ever bowled in Test cricket.

Your Answer : (Not Answered)

Correct Answer : C

It is the Nile.

The Nile is conventionally given as 6,650 km from its most distant headstream to the Mediterranean. The Amazon is close behind at about 6,400 and carries far more water; which is longer depends on where each source is taken to begin.

Your Answer : (Not Answered)

Correct Answer : C

It is Ben Okri.

The Famished Road won the Booker in 1991. Its narrator Azaro is an abiku, a spirit child who keeps returning to the world of the living, and the novel moves between that world and this without marking the boundary.

Your Answer : (Not Answered)

Correct Answer : D

Anand Mahindra was the first Indian to receive it.

The Harvard Medal is given for extraordinary service to the university. He is an alumnus of Harvard College and the Business School, and endowed the Mahindra Humanities Center there.

Your Answer : (Not Answered)

Correct Answer : A

The Bharat Ratna is India's highest award.

Instituted in 1954, it is conferred for exceptional service of the highest order in any field. It carries no title and no monetary grant, only a sanad and a peepal-leaf medallion. The Padma Bhushan ranks third, after the Padma Vibhushan.

Your Answer : (Not Answered)

Correct Answer : D

For transforming the barren village of Ralegan Siddhi.

Anna Hazare organised watershed development, tree planting and a ban on liquor in the drought-prone Maharashtra village from 1975, turning it into a model of rural self-reliance. He received the Padma Bhushan in 1992.

Your Answer : (Not Answered)

Correct Answer : D

The robot was sent by Russia.

In August 2019 Russia launched the humanoid robot Fedor (Skybot F-850) on an uncrewed Soyuz spacecraft to the International Space Station, where it was tested on tasks such as handling tools. It was Russia's first humanoid robot in space.

Japan had earlier sent the small talking robot Kirobo, not a life-sized one in 2019, and neither China nor the USA sent the August 2019 robot.