Daily Current Affairs & G.K : 22/07/2025
1, When is ‘Pi Approximation’ Day observed every year?
Answer : 22 July
‘Pi Approximation Day’ is observed every year on July 22.
Why July 22?
The date 22/7 (in day/month format) represents the common fractional approximation of the mathematical constant π (pi ≈ 3.14159). The fraction 22/7 ≈ 3.142857, which is a close approximation of π.
Fun Fact:
• Pi Day is also celebrated on March 14 (3/14), based on the decimal value of pi (3.14).
• Pi Approximation Day (July 22) focuses on the fractional representation, while Pi Day (March 14) celebrates the decimal form.
2, Which edition of BIMSTEC Disaster Management Exercise was hosted by India?
Answer : Fourth
India hosted the first edition of the BIMSTEC Disaster Management Exercise:
• The 1st BIMSTEC Annual Disaster Management Exercise (DMEx‑2017) was held in New Delhi & the National Capital Region, India, from 10–13 October 2017, organized by the National Disaster Response Force (NDRF) on behalf of the government of India.
Additionally, India also hosted the 2nd edition in 2020 (in Bhubaneswar/Puri, Odisha) and the 4th edition virtually in July 2025, but the question refers to which edition was hosted by India—that is the first edition, DMEx‑2017.
3 Aditi Chauhan, who recently retired, is associated with which sport?
Answer : Football
Aditi Chauhan is associated with football — specifically, she was a goalkeeper for the Indian women’s national football team, and has recently announced her retirement from the sport.
Career Highlights
• First Indian woman to play professional football in Europe, joining West Ham United Ladies in 2015.
• Earned 57 caps for India and played a key role in winning the SAFF Women’s Championship in 2012, 2016, and 2019, as well as South Asian Games gold medals.
• At club level with Gokulam Kerala FC, she won multiple Indian Women’s League titles and reached the semi-finals of the AFC Women’s Club Championship.
4, Which country was recently declared trachoma-free by the World Health Organization?
Answer : Senegal
The country most recently validated as trachoma‑free by the World Health Organization is Burundi, which WHO officially declared as having eliminated trachoma as a public health problem on 11 July 2025.
Additional context:
• Senegal was validated shortly after, on 15 July 2025, as the 9th African country to eliminate trachoma.
• Prior to that, Mauritania was recognized on 19 May 2025 as the 7th country in the African Region to achieve this milestone.
5, According to QS Cities Ranking 2026, which is the best city for students in the world?
Answer : Seoul
According to the official QS Best Student Cities in the World 2026 ranking, Seoul, South Korea is ranked #1 as the best city for students globally.
It achieved a perfect overall score of 100, topping the list for the first time—overtaking London, which had held the position for six consecutive years.
Top 5 Student Cities in 2026
1, Seoul, South Korea (Overall score: 100)
2, Tokyo, Japan (Score: 99.9)
3, London, United Kingdom (Score: ~97.1)
4, Munich, Germany
5, Melbourne, Australia
Seoul’s number-one ranking is attributed to its strong combination of academic excellence, improved affordability, high desirability, and vibrant employer activity
6, In which city will the Women’s Kabaddi World Cup 2025 be held?
Answer : Hyderabad
The Women’s Kabaddi World Cup 2025 was originally scheduled to be held in Rajgir, Bihar, from early June. However, in July 2025, the venue was officially shifted—it will now take place in Hyderabad, at the Gachibowli Indoor Stadium, from August 3 to 10, 2025
7, Which country has developed the lightest mind-control device for bees?
Answer : China
The world’s lightest mind‑control brain‑controller device for bees—at a mere 74 milligrams—was developed by a team at the Beijing Institute of Technology in China, led by Professor Zhao Jieliang.
This ultra‑lightweight controller, significantly lighter than the previous Singaporean designs, connects to the bee’s brain via three fine needles and delivers electrical pulses to guide movement. During lab tests, bees followed commands like turning left, right, or moving forward/backward with about 90% accuracy.