Given, After five years, the ratio of their ages becomes 7 : 4

Let, After five years, age of father = 7x and age of son = 4x.

According to the question,

Sum of present ages of father and son = (7x – 5) + (4x – 5) = 78

⇒ 11x – 10 = 78

⇒ 11x = 88

⇒ x = 8

∴ Present age of the father = 7 × 8 – 5 = 51 years

Given, A bag contains one rupee, 50 paise and 25 paise coins the proportion 5 : 7 : 9

Let, No. of one-rupee coins, 50 paise coins, and No. of 25 paise coins = 5a, 7a, and 9a.

According to the question,

5a × 100 + 7a × 50 + 9a × 25 = 430 × 100

⇒ 500a + 350a + 225a = 43000

⇒ a = 40

∴ Number of 25 paise coins = 9a = 360

Using weighted average formula:

Required Average =  = Rs. 54

Logic -> (x: x² - 1)

As,

18 : (18² - 1) -> 18 : (324 - 1) -> 18 : 323

Similarly,

24 : (24² - 1) -> 24 : (576 - 1) -> 24 : 575

 
Hence, option B is the correct answer.

Checking for all the given options:
Option (A).
9 ÷ 11 × 31 + 62 - 13 ≠ 18 (incorrect)
Option (B).
9 - 11 ÷ 31 + 62 × 13  ≠ 18 (incorrect)
Option (C).
9 × 11 + 31 ÷ 62 – 13 ≠ 18 (incorrect)
Option (D).
9 + 11 ÷ 31 × 62 – 13
9 + 11 × 2 – 13
9 + 22 – 13 = 18(correct)
Hence, option D is the correct answer.

When the paper is unfolded it will appear as:

Step 1:

Step 2:

Hence, option D is the correct answer.

The wrongly spelt word is “Toungue” and the correct spelling is “Tongue” which is the movable part in the mouth.

Let’s understand the meaning of other words :-

Rogue = a dishonest or unprincipled man.

Argue = to give reasons that support your opinion about something.

Vague = not clear or definite.

Hence, option C is the correct answer.

Let us understand the meaning of the given words:

Create = to make something new.

Develop = to grow slowly, increase, or change into something else.

Deploy = to use something or someone in an effective manner.

Derive = to get something from something.

Destroy = to damage something so badly that it cannot be used.

Hence, option D is the correct answer.

Let us understand the meaning of the given words:

Erase = to remove something completely.

Evacuate = to move from a dangerous place to a safer place.

Empty = to take out everything from inside something.

Expelled = to force someone to leave a country, organization, or school.

The old building may become a dangerous place to live in during monsoons, thus the families were removed from the building for safety, thus “evacuate” is the appropriate choice.

Hence, option B is the correct answer.

* The headquarters of Syndicate Bank is situated in Manipal.

* Canara Bank and Vijaya Bank have headquarters located in Banglore.

* The headquarters of Punjab and Singh Band and Punjab National Bank are located at New Delhi.

* The headquarters of Bandhan Bank, UCO Bank, UBI Bank and Allahabad Bank are located at Kolkata.

* Shehnai is a reed instrument.

* Reed instrument is basically a string instrument which has a string or multiple strings to produce sound.

* Majira is a pair of clash cymbals used to produce sounds.

* The tabla is a set of two drums that are played while sitting on the floor.

* Bansuri is an air musical instrument.

* Metals produce ringing sound when hit another metal because they are sonorous.

* The the ability of metals to deform under compressive stress is known as Malleability.

* The property of metals to stretch under tensile strain is Ductility.

* Metallic luster is a property of a metal that describes the amount of light that reflects off the metal.