Question Discussion & Solution

The pattern followed here is:

25 → First digit of 23 and second digit of 65.

68 → First digit of 61 and second digit of 38.

? → First digit of 72 and second digit of 48 → 78.

Hence, the answer is 78.

Valency is the combining power of an element. Elements in the same group of the periodic table have the same valency.

Key Points

• Valency is the no of electron that looses, shared or gain to achieve stability or we can say to complete it outer most shell. 
• If any element has valence electron (electrons present in outer most shell) less than 4
  • ​​Valency = no of valance electron (valence electron<4)
• If any element has valence electron ​more than 4
  • ​​Valency = 8 - no of valance electron (valence electron>4)

​For Lithium:

• Li(Z=3) Electronic configuration = 2, 1
  • Valency = no of valance electron  = 1

​Hence, we can conclude that 1 is the valency of Lithium.

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

Concept

The eight primitive data types supported by the Java programming language are:

• byte: The byte data type is an 8-bit signed two's complement integer. It has a minimum value of -128 and a maximum value of 127 (inclusive). 

• short: The short data type is a 16-bit signed two's complement integer. It has a minimum value of -32,768 and a maximum value of 32,767 (inclusive).

• int: By default, the int data type is a 32-bit signed two's complement integer, which has a minimum value of -231 and a maximum value of 231-1. In Java SE 8 and later, you can use the int data type to represent an unsigned 32-bit integer, which has a minimum value of 0 and a maximum value of 232-1. .

• long: The long data type is a 64-bit two's complement integer. The signed long has a minimum value of -263 and a maximum value of 263-1. In Java SE 8 and later, you can use the long data type to represent an unsigned 64-bit long, .

• float: The float data type is a single-precision 32-bit IEEE 754 floating point.

• double: The double data type is a double-precision 64-bit IEEE 754 floating point. For decimal values, this data type is generally the default choice. 

• boolean: The boolean data type has only two possible values: true and false. 

• char: The char data type is a single 16-bit Unicode character. It has a minimum value of '\u0000' (or 0) and a maximum value of '\uffff' (or 65,535 inclusive).

Hence there are 8 primitive data types, that is, byte, short, int, long, float, double, boolean and char

Additional Information

Non-primitive data types - such as String, Arrays, ArrayList, Integer, Long,  etc.

The correct answer is Anirudh Singh.

Key Points

• Anirudh Singh-
  • He was the 15th king of Bundi state.
  • He was married to Rani Nathawat Ji.
  • He built 84 pillared cenotaphs, for his beloved nurse Deva.
  • He served Aurangzeb in the Deccan.
  • He was later transferred to the northwest under Prince Muazzam.

Additional Information

•  Surajmal-
  • He was the son of Narayan Das.
  • He killed Rana Sanga's elder son Ratan Singh at Aheriya festival.
• Ratan Singh-
  • He was made king of Bundi after Rav Bhoj.
  • Jahangir gave Ramraj title to him.
  • Due to Ratan Singh's painting love, Jahangir gave him Sir Bundray's title.
  • In his reign, Kota was separated from the Bundi state by Shahjahan.
• Veer Singh-
  • He built the Taragarh fort in Bundi.
  • Maharana Lakha attacked him.
  • Mahmood Khilaji attacked him three times