Correct Answer: $4$

Solution : $4x^2+8x$ = $(2x)^2+2×(2x)×2$
Adding $4$ on both sides then use identity: $(a + b)^2 = a^2 + b^2 + 2ab$
$4x^2+8x+4$ = $(2x)^2+2×(2x)×2+4$ = $(2x+2)^2$
Thus, $4$ is to be added to $4x^2+8x$ to make it a perfect square.
Hence, the correct answer is $4$.

Correct Answer: Multimeter

Solution : Given:
Pressure: Barometer:: Electricity: ?

The second term is an instrument or machine used to measure the first term –
Like in, Pressure: Barometer→Barometer is used to measure pressure.
Similarly, follow the same pattern for,  Electricity: ?→A multimeter is used to measure electricity.

Therefore, the

Correct Answer: Article 315

Solution : The correct answer is Article 315.

The establishment of Public Service Commissions for the Union and the States is laid down in Article 315 of the Constitution of India. According to Article 315 of the Constitution, there shall be a Public Service Commission

Correct Answer: calcium carbonate equivalents

Solution : The correct answer is calcium carbonate equivalents.

The hardness of water is typically expressed in parts per million (ppm) and evaluated in terms of calcium carbonate due to the high molecular weight of calcium carbonate (100 g/mol) and the fact that it

Correct Answer: 3

Solution : Taking dice positions 1 and 2 with 3$\triangle$ as the common face –

Moving clockwise from the common face with 3$\triangle$ –

So, the opposite pairs are –

Thus, when there is one triangle at the bottom, three triangles will be there on the top

Correct Answer: Indore

Solution : The correct answer is Indore.

The Rajwada Palace (cultural heritage project) is located in Indore’s Khajuri Bazar in Madhya Pradesh. It is a historical palace built by the Holkars of the Maratha empire. It is a 7 storied palace that was built in the

Correct Answer: approximately 42%

Solution : Single equivalent discount = $(a+b-\frac{a×b}{100}$)%, where $a$% and $b$% are successive discounts.
So, a single equivalent discount of 17% and 22%
$=17+22-\frac{17×22}{100}=39-3.74=35.26\%$
Now, a single equivalent discount of 35.26% and 11% $=35.26+11-\frac{35.26×11}{100}=46.16-3.88=42.28\% \approx42\%$
Hence, the correct answer is approximately 42%.

Correct Answer: Butterflies in his stomach

Solution : The correct choice is the first option.

Explanation:

Butterflies in his stomach refer to the feeling of nervousness or anxiety, especially before an important event like an interview. It captures the sense of uneasiness or fluttery sensations in the stomach due to

Correct Answer: Odisha

Solution : The correct option is Odisha.

In Bhubaneswar, Odisha, are the well-known Udayagiri and Khandagiri Caves. These caves are part of a hill complex and are old rock-cut constructions. The Udayagiri and Khandagiri Caves are well-liked tourist destinations of historical and archaeological value. Their elaborate

Correct Answer: Mammals

Solution : The correct answer is Mammals.

The Pinna is the outermost part of the ear in mammals and is characterised by its composition of yellow cartilage and skin. It stands as a distinctive feature unique to this class of animals. The outer ear is further