Question:

Who, among the following, is the author of the book ‘Khandakhadyaka’?

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Important scholars and works:
• Aryabhatta → Aryabhatiya
• Brahmagupta → Khandakhadyaka
• Varahamihira → Brihat Samhita Ancient Indian science and astronomy are important examination topics.
Updated On: May 26, 2026
  • Aryabhatta
  • Varahamihira
  • Aryadeva
  • Brahmagupta
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The Correct Option is D

Solution and Explanation

Concept: Ancient India made remarkable contributions in mathematics and astronomy. Several scholars wrote important scientific treatises dealing with:
• arithmetic,
• algebra,
• planetary motion,
• and astronomical calculations. “Khandakhadyaka” is one of the important astronomical works written by the great Indian mathematician and astronomer Brahmagupta.

Step 1:
Understanding Brahmagupta’s contribution. Brahmagupta was a famous Indian mathematician and astronomer of the 7th century CE. He made major contributions in:
• algebra,
• arithmetic,
• geometry,
• and astronomy. His works influenced both Indian and Islamic scientific traditions.

Step 2:
About the book ‘Khandakhadyaka’. “Khandakhadyaka” is an astronomical treatise dealing with:
• planetary calculations,
• eclipse computation,
• calendrical systems,
• and astronomical observations. The text became highly influential among later astronomers.

Step 3:
Analyzing all the options carefully.
Option (A) Aryabhatta: Aryabhatta wrote the famous Aryabhatiya, not Khandakhadyaka.
Option (B) Varahamihira: Varahamihira wrote important works such as Brihat Samhita, but not Khandakhadyaka.
Option (C) Aryadeva: Aryadeva was associated with Buddhist philosophy rather than astronomy.
Option (D) Brahmagupta: Brahmagupta authored Khandakhadyaka. Therefore, this option is correct.

Step 4:
Importance of Brahmagupta in mathematics. Brahmagupta is especially remembered for:
• rules involving zero,
• treatment of negative numbers,
• algebraic equations,
• and astronomical calculations. His scientific ideas spread beyond India and influenced global mathematics.

Step 5:
Final conclusion. Since the book Khandakhadyaka was written by Brahmagupta, the correct answer is: \[ \boxed{\text{Brahmagupta}} \]
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