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21 Views

Question : What is the value of $14^{3}+16^{3}+18^{3}+...+30^{3}$?

Option 1: 134576

Option 2: 120212

Option 3: 115624

Option 4: 111672

Team Careers360 16th Jan, 2024

Correct Answer: 111672


Solution : Given:
$14^{3}+16^{3}+18^{3}+.....+30^{3}$
$= 2^{3}\times7^{3}+2^{3}\times8^{3}+2^{3}\times9^{3}+.....+2^{3}\times15^{3}$
$= 2^{3}(7^{3}+8^{3}+9^{3}+.....+15^{3})$
$= 2^{3}[(1^{3}+2^{3}+3^{3}+4^{3}+....+15^{3})-(1^{3}+2^{3}+3^{3}+4^{3}+5^{3}+6^{3})]$
The sum of cubes of $n$ natural numbers$ =\left[\frac{n(n+1)}{2}\right]^2$
For $n = 6$, we have
$1^{3}+2^{3}+3^{3}+4^{3}+5^{3}+6^{3}=\left[\frac{6(6+1)}{2}\right]^2 = \left[\frac{42}{2}\right]^2 = (21)^{2} =$ 441
For $n = 15$, we have
$1^{3}+2^{3}+3^{3}+4^{3}+....+15^{3}=\left[\frac{15(15+1)}{2}\right]^2 = \left[\frac{240}{2}\right]^2 = (120)^{2} =$ 14400
Now, $2^{3}[(1^{3}+2^{3}+3^{3}+4^{3}+....+15^{3})-(1^{3}+2^{3}+3^{3}+4^{3}+5^{3}+6^{3})]$

17 Views

Question : The typical natural vegetation above 3600 metres on the Himalaya is 

Option 1: Alpine grassland

Option 2: alpine forests

Option 3: coniferous forests

Option 4: subtropical pine forests

Team Careers360 24th Jan, 2024

Correct Answer: Alpine grassland


Solution : The Correct Answer is-  Alpine grassland 

Alpine grassland dominates the Himalayan mountains' typical natural vegetation above 3600 meters. Silver fur, pine birch, and other important trees are listed. A natural alpine grassland at a high elevation, the Alpine-steppe is a subregion of the Montane

10 Views

Question : The basic objective of all production is to:

Option 1: satisfy human wants

Option 2: provide employment

Option 3: make profit

Option 4: increase physical output

Team Careers360 21st Jan, 2024

Correct Answer: satisfy human wants


Solution : The correct answer is to satisfy human wants.

The fundamental goal of all manufacturing is to generate commodities and services that fulfil human desires and needs. To put it another way, the primary goal of production is to create items that may

14 Views

Question : The toxic metal associated with the Minamata disease is:

Option 1: lead

Option 2: cadmium

Option 3: arsenic

Option 4: mercury

Team Careers360 21st Jan, 2024

Correct Answer: mercury


Solution : The correct option is mercury.

The Minamata incident occurred in the 1950s, and 1960s in Minamata, Japan, as a result of a chemical factory controlled by the Chisso Corporation releasing methylmercury into the waters of Minamata Bay. The deadly mercury compound made its way

31 Views

Question : Direction: Following is the pie chart showing the result of the survey among 119060 people concerning tobacco. Study the pie diagram and answer the following question.

The number of cigarette-smoking people is greater than the number of pipe-smoking people 

Option 1: 29,765 

Option 2: 47,624

Option 3: 11,906

Option 4: 59,530

Team Careers360 14th Jan, 2024

Correct Answer: 47,624


Solution : Total number of people = 1,19,060
Degree subtended by number of people smoking cigarettes = 180$^\circ$
Degree subtended by number of people smoking pipe = 36$^\circ$
The number of cigarette-smoking people is greater than the number of pipe-smoking people = $\frac{180^\circ-36^\circ}{360^\circ}\times 119060=\frac{144^\circ}{360^\circ}\times 119060$ = 47624

38 Views

Question : Which of the following is consistent with the import substitution policy?

Option 1: Capital account convertibility

Option 2: Flexible exchange rate policy

Option 3: Tariffs and quotas

Option 4: Current account convertibility

Team Careers360 24th Jan, 2024

Correct Answer: Tariffs and quotas


Solution : The correct option is Tariffs and quotas.

Both tariffs and quotas are consistent with import substitution policies. Import substitution is an economic policy that aims to promote domestic industries by reducing reliance on imported goods. Tariffs involve imposing taxes on imported goods,

19 Views

Question : If $p^2+q^2=7pq$, then the value of $\frac{p}{q}+\frac{q}{p}$ is equal to:

Option 1: 9

Option 2: 5

Option 3: 7

Option 4: 3

Team Careers360 11th Jan, 2024

Correct Answer: 7


Solution : Given: $p^2+q^2=7pq$
Divide the above equation by $pq$ on both sides, we get,
⇒ $\frac{p^2+q^2}{pq}=\frac{7pq}{pq}$
⇒ $\frac{p}{q}+\frac{q}{p}=7$
Hence, the correct answer is 7.

17 Views

Question : If the sum of a non-zero number and thrice its reciprocal is $\frac{52}{7}$. Find the number.

Option 1: 8

Option 2: 9

Option 3: 7

Option 4: 6

Team Careers360 24th Jan, 2024

Correct Answer: 7


Solution : Given: The sum of a non-zero number and thrice its reciprocal is $\frac{52}{7}$.
Let the number be $x$.
According to the question,
$x+\frac{3}{x}=\frac{52}{7}$
$\Rightarrow 7x^2-52x+21=0$
$\Rightarrow (7x-3)(x-7)=0$
$\Rightarrow (7x-3)$ or $(x-7)=0$
$\Rightarrow x=7$ or $ \frac{3}{7}$
After checking the options, we get, $x=7$
Hence, the

11 Views

Question : Select the most appropriate meaning of the given idiom.

Leave no stone unturned

Option 1: To act in a strange manner

Option 2: Make all possible efforts

Option 3: To get fired from the job

Option 4: Not willing to accept the ideas of others

Team Careers360 14th Jan, 2024

Correct Answer: Make all possible efforts


Solution : The correct choice is the second option.

Explanation:
This phrase implies putting in exhaustive effort, leaving nothing overlooked or unexplored, to achieve a particular goal. It suggests thoroughness and determination in pursuing something.

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