Question Discussion & Solution

Refrigerator, furniture and television are needed in one house but these are not the necessary things. Without these three a house can be built but without the walls a house cannot be built.

In the question figure, there are 2 square blocks. Half of both square blocks are shaded and the other half is blank. One of the square blocks has its left half shaded and another square block has its right half shaded. Thus, in the answer figure, the square block whose left half is shaded should have its right block shaded and the square block whose right half is shaded should have its left half shaded.

Therefore option 1, 2, and 4 gets eliminated.

Hence, the figure in option 3 is the correct answer.

Let Rahul’s age be x.

Let Rita’s age be y.

Let Ekta’s age be z.

⇒ x = y + 3

⇒ y = 4z – 3

⇒ x = 4z – 3 + 3

⇒ x = 4z

⇒ x/z = 4

⇒ x ∶ z = 4 ∶ 1

The correct answer is OMR.

Important Points

• Optical mark recognition
  • It is the input device used to scan a marked answer book of a multiple choice question paper.
  • An optical answer sheet or bubble sheet is a special type of form used in multiple-choice question examinations. 
  • Optical mark recognition is used to detect answers.

Additional Information

• OCR
  • ​OCR (Optical Character Recognition) recognizes all the characters from the paper document.
  • It collects and stores them into an editable document.
• ​MICR
  • ​The term magnetic ink character recognition (MICR) refers to the line of numbers that appears at the bottom of a check.
  • The MICR line is a group of three numbers, which are the check number, account number, and bank routing number.
• Card reader
  • A card reader is a data input device that reads data from a card-shaped storage medium.

A mountain range is a group or chain of mountains that are near together and formed by orogenic forces.

Important Points

• The Aravalli Range (sometimes called Aravali) is a mountain range in Northern-Western India.
• It runs roughly 670 kilometers (430 miles) from Delhi to Gujarat, going through southern Haryana and Rajasthan.
• Guru Shikhar, at 1,722 meters, is the tallest summit (5,650 ft).
• The Aravalli Range, which dates back to the Proterozoic era, is considered the world's oldest fold mountain system.

Additional Information

• Vindhya and Satpura ranges run parallel to each other and separate peninsular India from the mainland. 
• The Himalayas protect the Indian subcontinent from the North East as a natural barrier providing geopolitical benefits to the country.
• Vindhya, Satpura, and Himalayas are all young-fold mountains.

Hence, Aravallis is the oldest folded mountain in India.