Question Discussion & Solution

The pattern followed is:

There are two series here:

i) 5, 10, 20, 40, 80

5 × 2 = 10

10 × 2 = 20

20 × 2 = 40

40 × 2 = 80

ii) S, R, Q, P, O

S - 1 = R

R - 1 = Q

Q - 1 = P

P - 1 = O

Hence, the correct answer is "80O".

1^st letter: increase by - 8, - 4, - 2, - 1

P - 8→ H - 4→ D - 2 → B - 1 → A

2^nd letter: second letter increase by + 2

K + 2→ M +2 → O + 2 → Q + 2 → S

3^rd letter: Decrease by - 1

R - 1→ Q – 1 → P - 1 → O – 1 → N

The Correct Answer is Option (2) i.e C.

• The C language is also known as the mother of all programming languages.
• C is a general-purpose programming language that is used for creating a variety of applications.
• C language was originally developed for writing operating systems. Unix Kernel and all of its supporting tools and libraries are written in C language.
• The C language is used for the following operations :
  • Operating systems
  • Development of new languages
  • Computation platforms
  • Embedded systems
  • Graphics and Games
• C++ and Java are the high-level languages and COBOL is a compiled English-like computer programming language.

The correct answer is Monaco.

• As of June 2020, Monaco has the highest population density.

Key Points

• Monaco is the world’s second-smallest country.
• It has a population density of 26,150.3 residents per square kilometre.
• Monaco is famous for the Monte Carlo casino and for hosting the Monaco Grand Prix Formula One race.

Additional Information

• Population density is the total number of individuals present in per unit area.

The correct answer is B12.

• Cobalamin is the scientific name of B12.

Key Points

• Vitamins:
  • It was first invented by FG Hopkins.
  • The term vitamin was coined by C Funk.
  • Vitamins provide no calories, they only regulate chemical reactions occurring in the metabolism of the body.
    • Water-soluble vitamins are Vitamin-B and Vitamin-C.
    • Fat-soluble vitamins are Vitamin-A, Vitamin-D, Vitamin-E and Vitamin-K. {Trick to remember: KEDA does not dissolve in water}
• Vitamin-B12:
  • Its chemical name is cobalamin.
  • Cyanocobalamin is a man-made form of vitamin B12.
  • Cobalt is found in Vitamin-B12. 
  • It is water-soluble.
  • Its deficiency causes Pernicious anaemia.
  • Its rich sources are Meat, poultry, fish, eggs, milk.

Additional Information​