Explanation

• Father of Double-Entry Bookkeeping (Father of Modern Accounting): Luca Pacioli
• Nationality: Italian
• Famous Book Published: Summa de Arithmetica, Geometria, Proportioni et Proportionalità
• Publication Year: 1494
• Accounting Rule: Every transaction has two entries – Debit and Credit

Last verified on 21-07-2026

Explanation

• Bullfighting (Corrida de Toros) is a traditional sport of Spain.
• It has been practiced in Spain for centuries.
• The main performer is called a Matador.

Last verified on 21-07-2026

Explanation

Explanation

• The Mantle is the middle layer located between the crust and the core.
• It is the thickest layer of the Earth.
• It is made of hot, semi-solid rock.
• Thickness of Mantle: About 2,900 km
• Earth's Average Radius: About 6,371 km

Additional information:

• The Earth has three main layers: Crust, Mantle, and Core.
• Outermost layer: Crust
• Innermost layer: Core

Last verified on 21-07-2026

Explanation

• A bit (binary digit) is the smallest unit of data in a computer.
• It can have a value of 0 or 1, representing two possible states.

Additional information:

• 1 Byte = 8 bits
• 1 Kilobyte (KB) = 1024 Bytes
• 1 Megabyte (MB) = 1024 KB
• 1 Gigabyte (GB) = 1024 MB
• 1 Terabyte (TB) = 1024 GB

Last verified on 12-03-2026

Explanation

• Total Vertebrae: 33
• Cervical Vertebrae: 7
• Thoracic Vertebrae: 12
• Lumbar Vertebrae: 5
• Sacral Vertebrae: 5 (fused) and Coccygeal Vertebrae: 4 (fused)

Additional information:

• Total bones in an adult: 206
• Bones in a newborn: About 300
• Longest bone: Femur
• Shortest bone: Stapes
• Bones in the skull: 22
• Bones in one hand: 27

Last verified on 21-07-2026

Explanation

• Venus is called the Morning Star and Evening Star.
• It is the second closest planet to the Sun.
• It is the brightest planet and the hottest planet in the Solar System.
• It has no natural moon (satellite).
• It is also known as the "Black Planet".

Last verified on 21-07-2026

Explanation

• An Astronomical Unit (AU) is the average distance between the Earth and the Sun.
• It is a standard unit used to measure distances within the Solar System.
• 1 AU = 149,597,870.7 km
• 1 AU = 92,955,807.3 miles
• Light travels 1 AU in: About 8 minutes 20 seconds

Last verified on 21-07-2026

Explanation

Explanation

• Hazrat Abu Bakr (RA), the first Caliph of Islam, ruled for approximately 2 years (2 years, 2 months, and 14 days).
• His caliphate lasted from 8 June 632 CE to 23 August 634 CE.
• He became the first Caliph after the death of Prophet Muhammad (ﷺ).
• He passed away due to illness in August 634 CE.

Additional information:

• Umar ibn al-Khattab: 10 years, 6 months, and 4 days
• Uthman ibn Affan: 11 years, 11 months, and 18 days
• Ali ibn Abi Talib: 4 years, 9 months, and 7 days

Last verified on 07-07-2026