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16 Views

Question : Who among the following is a famous tennis player?

Option 1: Neeraj Chopra

Option 2: Milkha Singh

Option 3: Mahesh Bhupathi

Option 4: T. C. Yohannan

Team Careers360 23rd Jan, 2024

Correct Answer: Mahesh Bhupathi


Solution : The correct answer is Mahesh Bhupathi.

In the 1990s and 2000s, Mahesh Bhupathi was regarded as one of the best doubles players. Wimbledon and the French Open were among the three doubles championships that Bhupathi and Leander Paes won in 1999. He won

139 Views

Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
5, 20, 60, 240, 720, ?

Option 1: 2580

Option 2: 2880

Option 3: 2160

Option 4: 2675

Team Careers360 23rd Jan, 2024

Correct Answer: 2880


Solution : Given:
5, 20, 60, 240, 720, ?

To get the required missing number in the series, multiply the number by 4 and 3 alternatively –
5 × 4 = 20; 20 × 3 = 60; 60 × 4 = 240; 240 × 3 = 720;

11 Views

Question : If $\triangle A B C$ is right angled at $B, A B=12 \mathrm{~cm}$ and $\angle C A B=60^{\circ}$, determine the length of $BC$. 

Option 1: $24 \sqrt{3} \mathrm{~cm}$

Option 2: $12 \mathrm{~cm}$

Option 3: $12 \sqrt{2} \mathrm{~cm}$

Option 4: $12 \sqrt{3} \mathrm{~cm}$

Team Careers360 23rd Jan, 2024

Correct Answer: $12 \sqrt{3} \mathrm{~cm}$


Solution :
Given, $\triangle$ABC is right angled at B, where AB = 12 cm and $\angle$CAB = 60°
By using the trigonometric ratio involving AB and BC.
To $\angle$CAB, AB is the adjacent side and BC is the opposite side.
$\tan\angle CAB$ = $\tan 60°$

14 Views

Question : If $x^{4}+\frac{1}{x^{4}}=34$, what is the value of $x^{3}-\frac{1}{x^{3}} $?

Option 1: 0

Option 2: 6

Option 3: 8

Option 4: 14

Team Careers360 22nd Jan, 2024

Correct Answer: 14


Solution : Given: $x^{4}+\frac{1}{x^{4}}=34$
Adding 2 to both sides, we get,
$⇒x^{4}+\frac{1}{x^{4}}+2=34+2$
$⇒(x^{2}+\frac{1}{x^{2}})^{2}=(6)^{2}$
$⇒x^{2}+\frac{1}{x^{2}}=6$
Subtracting 2 from both sides, we get,
$⇒x^{2}+\frac{1}{x^{2}}-2=6-2$
$⇒(x-\frac{1}{x})^{2}=(2)^{2}$
$⇒x-\frac{1}{x}=2$
Now, $(x-\frac{1}{x})^3=x^3-\frac{1}{x^3}-3×x×\frac{1}{x}(x-\frac{1}{x})$
$⇒2^3=x^3-\frac{1}{x^3}-3×2$
$\therefore x^{3}-\frac{1}{x^{3}}=14$
Hence, the correct answer is 14.

17 Views

Question : When did Heinrich Hertz discover the photoelectric effect and observe that shining ultraviolet light on the electrodes caused a change in voltage between them?

Option 1: 1916

Option 2: 1902

Option 3: 1990

Option 4: 1887

Team Careers360 22nd Jan, 2024

Correct Answer: 1887


Solution : The correct option is 1887.

In the year 1887, German physicist Heinrich Hertz made a pivotal discovery related to the photoelectric effect while researching radio waves. In the course of his experiments, Hertz utilised a spark gap consisting of two closely spaced, sharp electrodes capable

22 Views

Question : If $\operatorname{cosec}\theta-\sin\theta=l$ and $\sec\theta-\cos\theta=m$, then the value of $l^2m^2(l^2+m^2+3)$ is:

Option 1: $–1$

Option 2: $0$

Option 3: $1$

Option 4: $2$

Team Careers360 25th Jan, 2024

Correct Answer: $1$


Solution : Given:
$\operatorname{cosec}\theta-\sin\theta=l$ and $\sec\theta-\cos\theta=m$, $l^2m^2(l^2+m^2+3)$
$=(\operatorname{cosec}\theta-\sin\theta)^2(\sec\theta-\cos\theta)^2[(\operatorname{cosec}\theta-\sin\theta)^2+(\sec\theta-\cos\theta)^2+3]$
$= (\frac{1}{\sin\theta}-\sin\theta)^2(\frac{1}{\cos\theta}-\cos\theta)^2[(\frac{1}{\sin\theta}-\sin\theta)^2+(\frac{1}{\cos\theta}-\cos\theta)^2+3]$
$=(\frac{1-\sin^2\theta}{\sin\theta})^2(\frac{1-\cos^2\theta}{\cos\theta})^2[(\frac{1-\sin^2\theta}{\sin\theta})^2+(\frac{1-\cos^2\theta}{\cos\theta})^2+3]$
$=(\frac{cos^2\theta}{\sin\theta})^2(\frac{\sin^2\theta}{\cos\theta})^2[(\frac{\cos^2\theta}{\sin\theta})^2+(\frac{\sin^2\theta}{\cos\theta})^2+3]$
$=(\frac{\cos^4\theta}{\sin^2\theta})(\frac{\sin^4\theta}{\cos^2\theta})[(\frac{\cos^4\theta}{\sin^2\theta})+(\frac{\sin^4\theta}{\cos^2\theta})+3]$
$= \sin^2\theta \cos^2\theta[\frac{\cos^6\theta+\sin^6\theta+3\sin^2\theta \cos^2\theta}{\sin^2\theta \cos^2\theta}]$
$= \cos^6\theta+\sin^6\theta+3\sin^2\theta \cos^2\theta$
$=(\cos^2\theta)^3+\sin^2\theta)^3+3\sin^2\theta \cos^2\theta$
$=(\cos^2\theta+\sin^2\theta)^3-3\cos^2\theta \sin^2\theta(\cos^2\theta+\sin^2\theta)+3\sin^2\theta \cos^2\theta$
$=1^3-3\cos^2\theta \sin^2\theta(1)+3\sin^2\theta \cos^2\theta$
$=1$
Hence, the correct answer is $1$.

8 Views

Question : Who decides disputes regarding the disqualification of members of Parliament?

Option 1: The Supreme Court

Option 2: The Election Commission

Option 3: The Prime Minister in Consultation with the Election Commission

Option 4: The President in Consultation with the Election Commission

Team Careers360 22nd Jan, 2024

Correct Answer: The President in Consultation with the Election Commission


Solution : The correct answer is The President in Consultation with the Election Commission.

Depending on whether it is the Lok Sabha or the Rajya Sabha, the Speaker or the House Chairman decides on disqualification in defection-related cases. Even if

23 Views

Question : Which god is worshipped during the festival of Chhath Puja?

Option 1: Surya

Option 2: Agni

Option 3: Indra

Option 4: Vishnu

Team Careers360 25th Jan, 2024

Correct Answer: Surya


Solution : The correct answer is Surya.

The sun god Surya is the object of Chhath puja. All life on Earth originates from the sun, which is visible to all beings. Chhathi Maiya is worshipped on this day together with the Sun God.

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