Question Discussion & Solution

Number of persons between two different persons = Total number of persons – (position of person from left + position of persons from right)

Sum of positions of K & T from opposite ends = 23 + 28 = 51, i.e. less than the total number of students (<60)

Therefore, number of students between K & T = Total number of students - (position of K from left + position of T from right)

60 – (23 + 28) = 60 – 51 = 9

The correct answer is Silver.

Key Points

• Gold
  • It is one of the softest metals, and this quality makes it easier to design it in various jewelry designs.
  • It is tough making 24 karat gold jewelry. Other metals have to be added to it to increase its durability and strength.
  • If you wish to know what is 24 karat gold, you must understand that 24 karat gold is the purest form of this yellow metal.
  • Although 24 karat is pure gold, a jewelry piece made up of this purity is not solid and flexible enough.
  • When creating and crafting beautiful, intricately designed, and patterned gold jewelry, the metal needs to be added with other alloys to lend it the necessary strength.
  • The metals usually added to gold metal are zinc, nickel, silver, copper, etc. Hence, Option 3 is correct.
  • This is because when gold melts its state will change into a liquid.
  • Gold will like water so it flows and it will become difficult to mold.
  • So copper is added to gold which is there in the liquid state, so it will harden gold a little bit to prevent it from flowing which will be easy to mold gold to make ornaments.

Important Points

• Silver
  • It is a chemical element with the symbol Ag and atomic number 47.
  • A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.

Additional Information

• Zinc
  • It is a chemical element with the symbol Zn and atomic number 30.
  • Zinc is a slightly brittle metal at room temperature and has a silvery-greyish appearance when oxidation is removed.
  • It is the first element in group 12 of the periodic table.
• Lead
  • It is a chemical element with the symbol Pb and atomic number 82.
  • It is a heavy metal that is denser than most common materials.
  • Lead is soft and malleable, and also has a relatively low melting point.
  • When freshly cut, lead is silvery with a hint of blue; it tarnishes to a dull gray color when exposed to air.
• Tin
  • It is a chemical element with the symbol Sn and the atomic number 50.
  • Tin is a silvery metal that characteristically has a faint yellow hue.
  • Tin is soft enough to be cut with little force.

The correct answer is MICR.

Key Points

•  MICR- Magnetic Ink Character Recognition
  • It is a technology used primarily to identify and process checks.
  • The MICR on a check is the string of characters that appears at the bottom left of the check.
  • It consists of three groups of numbers, including the bank routing number, the account number, and the check number.

Additional Information

•  OCR- Optical Character Recognition
  • It is a widespread technology to recognize text inside images, such as scanned documents and photos.
  • It is used to convert virtually any kind of image containing written text (typed, handwritten, or printed) into machine-readable text data.
• OMR- Optical Mark Recognition
  • It is the process of reading information that people mark on surveys, tests, and other paper documents.
• IFSC- Indian Financial System Code
  • It represents the 11 digit character on our bank’s cheque leaves, or other bank-sponsored material.
  • This 11 character code helps identify the individual bank branches that participate in the various online money transfer options like NEFT and RTGS.

The correct answer is 14 years.

• Under Section-3 of the "Children and Adolescent Labor (Prohibition and Regulation) Act", it a cognizable offence for a child of 14 years to work in any type of hazardous area or non-risk area.

Key Points

• Child and Adolescent Labour (Prohibition and Regulation) Act, 1986
  • As per the Child and Adolescent Labour (Prohibition and Regulation) Act, 1986, a "Child" is defined as any person below the age of 14, and the CLPR Act prohibits employment of a Child in any employment including as domestic help.
  • The act was amended in 2016 ("CLPR Act").

​Additional Information

• Importance of the act
  • In 2011, the national census of India found the total number of child labourers, aged [5–14], to be at 10.1 million, out of the total of 259.64 million children in that age group.
  • The child labour problem is not unique to India; worldwide, about 217 million children work, many full-time.

Rajendra Prasad is the first president of India. Similarly, the first president of USA is George Washington.

Hence, George Washington is the correct answer.