What is the name of the mathematical concept that describes a value that never changes, like the ratio of a circle's circumference to its diameter? [#1259]

A constant is a mathematical concept that represents a value that remains unchanged, like pi (π), which is approximately 3.14 and never changes.

---

A constant is a mathematical concept that represents a value that remains unchanged, like pi (π), which is approximately 3.14 and never changes.

A monopoly market, in simple terms, means a single seller selling a unique product. The seller dominates the market by offering a unique product, setting its own prices, and high barriers restricting new entrants.

---

A monopoly market, in simple terms, means a single seller selling a unique product. The seller dominates the market by offering a unique product, setting its own prices, and high barriers restricting new entrants.

Lal Bahadur Shastri International Airport is an international airport serving Varanasi, Uttar Pradesh, India. It is located at Babatpur, 26 km northwest of Varanasi. Formerly known as Varanasi Airport, it was officially renamed after Lal Bahadur Shastri, the 2nd Prime Minister of India, in October 2005.

---

Lal Bahadur Shastri International Airport is an international airport serving Varanasi, Uttar Pradesh, India. It is located at Babatpur, 26 km northwest of Varanasi. Formerly known as Varanasi Airport, it was officially renamed after Lal Bahadur Shastri, the 2nd Prime Minister of India, in October 2005.

World Press Freedom Day was proclaimed by the UN General Assembly in December 1993, following the recommendation of UNESCO's General Conference. Since then, 3 May, the anniversary of the Declaration of Windhoek is celebrated worldwide as World Press Freedom Day.

---

World Press Freedom Day was proclaimed by the UN General Assembly in December 1993, following the recommendation of UNESCO's General Conference. Since then, 3 May, the anniversary of the Declaration of Windhoek is celebrated worldwide as World Press Freedom Day.

The Chola Empire, a medieval Indian kingdom, was renowned for its maritime trade and naval power, with extensive trade networks across Southeast Asia.

---

The Chola Empire, a medieval Indian kingdom, was renowned for its maritime trade and naval power, with extensive trade networks across Southeast Asia.

The Kamakhya temple, a prominent Shakti Peetha, is located on Nilachal Hill in Guwahati, Assam, India. It is dedicated to Goddess Kamakhya and is a significant pilgrimage site, especially for Tantric worshippers. The temple's location on Nilachal Hill adds to its spiritual significance, and the hill offers scenic views of the surrounding area and the Brahmaputra River.

---

The Kamakhya temple, a prominent Shakti Peetha, is located on Nilachal Hill in Guwahati, Assam, India. It is dedicated to Goddess Kamakhya and is a significant pilgrimage site, especially for Tantric worshippers. The temple's location on Nilachal Hill adds to its spiritual significance, and the hill offers scenic views of the surrounding area and the Brahmaputra River.

Margaret Hilda Thatcher was a British stateswoman and Conservative politician who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was the longest-serving British prime minister of the 20th century and the first woman to hold the position. As prime minister, she implemented economic policies known as Thatcherism. A Soviet journalist dubbed her the "Iron Lady", a nickname that became associated with her uncompromising politics and leadership style.

---

Margaret Hilda Thatcher was a British stateswoman and Conservative politician who served as Prime Minister of the United Kingdom from 1979 to 1990 and Leader of the Conservative Party from 1975 to 1990. She was the longest-serving British prime minister of the 20th century and the first woman to hold the position. As prime minister, she implemented economic policies known as Thatcherism. A Soviet journalist dubbed her the "Iron Lady", a nickname that became associated with her uncompromising politics and leadership style.

Interrogative sentences are used to ask questions or seek information, and typically begin with a question word like "who", "what", "where", "when", or "how".

---

Interrogative sentences are used to ask questions or seek information, and typically begin with a question word like "who", "what", "where", "when", or "how".

Fossils are the preserved remains or traces of ancient plants, animals, and microorganisms. They provide valuable information about the history of life on Earth, including evolution, extinction, and environmental changes.

---

Fossils are the preserved remains or traces of ancient plants, animals, and microorganisms. They provide valuable information about the history of life on Earth, including evolution, extinction, and environmental changes.

The Statue of Unity is located in the Kevadiya colony in Gujarat, India, on Sadhu-Bet Island in the Narmada River, facing the Sardar Sarovar Dam. It is about 100 kilometers (62 miles) southeast of Vadodara, and 3.5 kilometers downstream from the dam. The statue is 182 meters tall and is a tribute to Sardar Vallabhbhai Patel, one of India's most important leaders.

---

The Statue of Unity is located in the Kevadiya colony in Gujarat, India, on Sadhu-Bet Island in the Narmada River, facing the Sardar Sarovar Dam. It is about 100 kilometers (62 miles) southeast of Vadodara, and 3.5 kilometers downstream from the dam. The statue is 182 meters tall and is a tribute to Sardar Vallabhbhai Patel, one of India's most important leaders.

Kushal Konwar and Kamal Chandra Bhattacharya were prominent revolutionaries who led the Quit India Movement in Assam, playing a significant role in the freedom struggle against British rule. They were part of the Indian National Congress and worked tirelessly to mobilize support for the movement.

---

Kushal Konwar and Kamal Chandra Bhattacharya were prominent revolutionaries who led the Quit India Movement in Assam, playing a significant role in the freedom struggle against British rule. They were part of the Indian National Congress and worked tirelessly to mobilize support for the movement.