Correct Answer: Disclose

Solution : The correct choice is the fourth option.

Explanation: The hint here is to look for a word that has a similar meaning to reveal, which implies making something known or showing something that was previously hidden. Disclose fits this context perfectly, as it means to make information known or reveal something that was previously kept secret.

The meaning of the other options is as follows:

• Curb: This word means to restrain or control.
• Veil: This word means to cover or conceal.
• Darken: This word means to make something less bright or clear.

Therefore, the correct answer is disclose.

Correct Answer: gi

Solution : Given:
(I) life and love⇒ri ti gi
(II) life is tangible⇒mi pi ri
(III) love is pure⇒mi gi oi

By comparing all the three coded sentences, we find that –
In sentences I and II, life and ri are common.
In sentences I and III, love and gi are common.
In sentences II and III, is and mi are common.
The remaining word and codes in sentence 1 are and and ti; in sentence 2 are tangible and pi; in sentence 3 are pure and oi.
Finally, life⇒ri; love⇒gi; is⇒mi; and⇒ti; tangible⇒pi; pure⇒oi

So, the love is coded as gi. Hence, the first option is correct.

Correct Answer: 15

Solution : According to the question
 Prime numbers between 9 and 22:  are 11, 13, 17,19
Average of $n$ observations is given by $\frac{\text{Sum of all observations}}{n}$
⇒  Average = $\frac{(11 + 13 + 17 + 19)}{4}$ =  15
Hence, the correct answer is 15.

Correct Answer: (3)

Solution : The error lies in the third part of the sentence.

A question tag is a very short clause at the end of a statement that changes the statement into a question. We have a negative statement in the sentence, followed by a negative question tag. It should be replaced with a positive question tag. So, have you? should replace, didn't you?

Therefore, the correct sentence is: You haven't responded to my invitation, have you?

Correct Answer: Mercury

Solution : The correct answer is Mercury.

Mercury metal is an essential component of an amalgam. The atomic number of this element is 80. The symbol of Mercury is Hg, given after the Greek word hydor and argyros. Mercury serves as the liquid component that binds the other metals together to form a stable, durable filling material.

Correct Answer: To change the way one talks about something.

Solution : The correct option will be the first option.

The idiom to sing a different tune means to change one's attitude, opinion, or perspective on a particular matter. It is often used to describe someone who alters their stance or viewpoint, especially when they were previously expressing a different or opposing opinion.

Therefore, the correct meaning is to change the way one talks about something.

Correct Answer: 14

Solution : Given:
PINK is coded as 25, and HEAR is coded as 16. 

The sum of the positional values of the alphabet is divided by 2 to obtain the required code.
PINK→16 + 9 + 14 + 11 = 50; 50 ÷ 2 = 25
Thus, PINK is coded as 25.
HEAR→8 + 5 + 1 + 18 = 32; 32 ÷ 2 = 18
Thus, HEAR is coded as 18.
Similarly, follow the same pattern for FAIL→6 + 1 + 9 + 12 = 28; 28 ÷ 2 = 14

So, FAIL is coded as 14. Hence, the second option is correct.

Correct Answer: 112

Solution :  44 + 67 – 32 ÷ 4 + (9 + 5 + 5 + 4) – 4 × 12 ÷ 6 – 30 ÷ 5
= 111 – 8 + 23 – 4 × 2 – 6
= 111 + 15 – 8 – 6
= 112
Hence, the correct answer is 112.

Correct Answer: during

Solution : The correct choice will be the first option.

The word during is the correct preposition to use in this context. It indicates the time frame when fasting occurs, which is during some festivals.

Therefore, the sentence becomes grammatically correct and conveys the intended meaning with the use of during.

Correct Answer: Robert Hooke

Solution : The correct answer is Robert Hooke.

In 1665, the English scientist Robert Hooke is credited with being the first person to observe cells. He made this groundbreaking discovery while examining thin slices of cork under a microscope. Hooke's observations were documented in his book "Micrographia", where he coined the term "cell" to describe these basic structural units.