Your Answer : (Not Answered)

Correct Answer : C

A rational number is a number that can be expressed as a fraction p/q of two integers, where q is not zero. An irrational number cannot be expressed as such.

√2, √3, and √5 are irrational.

√4 = 2, which can be written as 2/1. Therefore, it is a rational number.

Your Answer : (Not Answered)

Correct Answer : C

All four use two 4s and two 2s, so look at how they are arranged.

In 4422, 2442 and 2244 the like digits sit together as pairs.

In 4242 they alternate, so no two identical digits are adjacent.

So 4242 does not belong.

Your Answer : (Not Answered)

Correct Answer : C

Let \(40\)% of \(A = \frac{2}{3} B\)

Then, \(\frac{40A}{100} = \frac{2B}{3}\)

\(\Rightarrow \frac{2A}{5} = \frac{2B}{3}\)

\(\Rightarrow \frac{A}{B} = (\frac{2}{3} \times \frac{5}{2}) = \frac{5}{3}\)

\(\therefore A : B = 5 : 3.\)

Your Answer : (Not Answered)

Correct Answer : C

Correct answer: January

All eight face the same way, so “right” means the same direction for every clue. E’s birthday falls after May, yet E has neither July nor December, and E cannot be the October person because two people sit between them - so E is September. G sits three places right of the July person and December sits two places right of G, which locks July, G and December into seats n, n+3 and n+5; H sits three places right of the January person. Adding February immediately left of D, one person between E and B, and A beside E but clear of G, exactly one line survives:

1 A (April) · 2 E (September) · 3 C (July) · 4 B (January) · 5 F (October) · 6 G (May) · 7 H (February) · 8 D (December)

B holds seat 4, and the birthday there is January.

Your Answer : (Not Answered)

Correct Answer : C

Correct answer: pay the fruit vendor for the damage done to him.

The damage is yours, and the vendor’s stock is his living. Paying him for what you have destroyed is the honest course, and settles the matter on the spot.

Your Answer : (Not Answered)

Correct Answer : A

Correct answer: Amoeba

Bacteria, germs and microbes are all general terms for very small organisms considered as a class. The amoeba is one particular organism, a named protozoan, so it is a member rather than a category.

Your Answer : (Not Answered)

Correct Answer : B

The error is in to do it.

Persist takes in and a gerund - he persisted in doing it. It never takes an infinitive.

Your Answer : (Not Answered)

Correct Answer : A

It is a simple past tense sentence given in active voice. Its conversion will be according to the rule ‘was/were + past participle form of the verb’. Only one option matches the criteria which is option (b). Hence, it is the right answer.

Your Answer : (Not Answered)

Correct Answer : C

Correct answer: Changes every occurrence in the document at once

Replace All changes every occurrence in the document in a single operation and reports how many replacements were made. Replace, by contrast, changes the current occurrence and moves to the next, allowing each to be judged individually. Replace All is best used with care, because a careless search string can do a great deal of damage - replacing art with craft will also alter party, start and heart unless Find whole words only is ticked. The result is undoable with Ctrl + Z, which undoes the entire operation as one step. The dialogue is more capable than it looks. Match case distinguishes capitals; formatting can be searched for as well as text; and special characters can be found by code - ^p for a paragraph mark, ^t for a tab - which makes it the standard way to tidy pasted text. With Use wildcards enabled it searches by pattern rather than by literal string.

Your Answer : (Not Answered)

Correct Answer : C

NEFA was renamed Arunachal Pradesh in 1972.

Under the North-Eastern Areas (Reorganisation) Act, 1971, the North-East Frontier Agency became the Union Territory of Arunachal Pradesh on 20 January 1972. It became a full state in 1987.

1971 is the year the Act was passed, not the year it took effect, and 1970 and 1974 mark no change in its name.

Arunachal Pradesh, Mizoram and Goa became full states in 1987.

Your Answer : (Not Answered)

Correct Answer : A

If the surface area is increased, the rate of evaporation will increase.

Evaporation is a surface phenomenon: only molecules at the surface of a liquid can escape into the air. A larger surface exposes more molecules, so more escape per second. That is why wet clothes dry faster when spread out, and why tea cools faster in a saucer than in a cup.

Evaporation also increases with temperature and wind speed and decreases with humidity, but with everything else held constant a larger area always speeds it up, so 'decrease', 'remain the same' and 'cannot be determined' are wrong.

Your Answer : (Not Answered)

Correct Answer : D

The set of chemical changes is rusting of iron, burning of paper, digestion of food.

In a chemical change new substances are formed. Rusting forms iron oxide, burning paper forms ash, carbon dioxide and water vapour, and digestion breaks food into simpler substances. None can be reversed by simple means.

Each other set includes a physical change: boiling water and breaking glass change only state or shape; dissolving salt or sugar in water can be reversed by evaporation; shredding paper changes only its size.

Your Answer : (Not Answered)

Correct Answer : B

This phenomenon is beats.

Two waves of slightly different frequency alternately reinforce and cancel, and the loudness rises and falls at the beat frequency \[f_{beat} = |f_1 - f_2|\] Musicians tune by listening for the beats to disappear.

Your Answer : (Not Answered)

Correct Answer : D

The Olympic Games of 1916, 1940 and 1944 were cancelled by the World Wars - 1916 by the First and the other two by the Second.

The Olympiads were still counted, which is why the numbering skips those years; London's 1948 Games were the fourteenth.

Your Answer : (Not Answered)

Correct Answer : B

Hydrogen is not a noble gas. It sits in group 1 of the periodic table and is highly reactive, burning in air and combining with most elements.

Helium, neon, argon, krypton, xenon and radon make up group 18, the noble gases, whose full outer shells make them almost entirely unreactive.

Your Answer : (Not Answered)

Correct Answer : A

15 January is Army Day in India.

It marks the day in 1949 when Field Marshal K.M. Cariappa took over as the first Indian commander-in-chief of the Indian Army from General Sir Francis Butcher, the last British holder of the post.

Your Answer : (Not Answered)

Correct Answer : C

World No Tobacco Day falls on 31 May.

The World Health Organization has kept it on that date since 1988. Tobacco kills more than eight million people a year, over a million of them non-smokers exposed to second-hand smoke.

Your Answer : (Not Answered)

Correct Answer : A

Salal is in Jammu and Kashmir.

The project on the Chenab in Reasi district, commissioned in 1987, was India's first hydroelectric scheme on that river. The Indus Waters Treaty allots the Chenab to Pakistan but permits India run-of-the-river works.

Your Answer : (Not Answered)

Correct Answer : A

Ikebana is flower arrangement.

The Japanese art dates from the sixth century and treats arrangement as a discipline of line, space and asymmetry rather than of mass and colour, the stems and leaves counting as much as the blooms.

Your Answer : (Not Answered)

Correct Answer : B

The chairman of the Public Accounts Committee is appointed by the Speaker of the Lok Sabha.

Since 1967 the post has by convention gone to a member of the opposition, which is what allows the committee to scrutinise government spending with real independence. It examines the CAG's reports.