No, Sydney has never been the capital of Australia. The capital of Australia is Canberra, which was purpose-built to be the capital and is located in the Australian Capital Territory. Sydney is the largest and most populous city in Australia, but it has never held the official title of capital. **

The math problem in the Kangaroo competition 2020 was a complex geometry question involving finding the area of a shaded region within a circle. Participants had to use their knowledge of geometry and circle properties to calculate the area accurately. This problem challenged the competitors' problem-solving skills and mathematical reasoning. **

The unknown flying object during the news broadcast was a mysterious aircraft that appeared to be flying at high speeds and performing maneuvers that were beyond the capabilities of known aircraft. It was seen darting across the sky and changing direction abruptly, leaving experts puzzled about its origin and purpose. The object did not match any known military or civilian aircraft, leading to speculation about its potential extraterrestrial nature. **

The best news I have received was when I found out that I had been accepted into my dream university. It was a moment of pure joy and excitement, and it felt like all my hard work had paid off. The worst news I have received was when I found out that a close family member had been diagnosed with a serious illness. It was a moment of shock and sadness, and it was difficult to process and come to terms with the news. **

Yes, Aboriginal people can have light skin. The skin color of Aboriginal people, like any other group of people, can vary widely. This variation is due to a combination of genetic factors and environmental influences. It is important to recognize and respect the diversity within the Aboriginal community, including differences in skin color. **

Kangaroos are marsupials native to Australia and are known for their powerful hind legs, large feet, and long tails. There are four main species of kangaroos: the red kangaroo, eastern grey kangaroo, western grey kangaroo, and antilopine kangaroo. These species vary in size, with the red kangaroo being the largest and the antilopine kangaroo being the smallest. Kangaroos are herbivores and are well adapted to the Australian outback, using their strong legs to hop long distances and their tails for balance. **

Kangaroos are marsupials native to Australia and are known for their powerful hind legs, large feet, and long tails. There are four main species of kangaroos: the red kangaroo, eastern grey kangaroo, western grey kangaroo, and antilopine kangaroo. Each species has its own unique characteristics and can be found in different regions of Australia. Kangaroos are herbivores and primarily feed on grasses, leaves, and shrubs. **

Sydney is known by a wide range of people, including its residents, tourists, historians, and those interested in Australian culture and history. Locals and tourists alike are familiar with the city's iconic landmarks such as the Sydney Opera House and Sydney Harbour Bridge. Historians and researchers are knowledgeable about the city's colonial history and its significance in the development of Australia. Additionally, people interested in Australian culture and lifestyle are likely to have some knowledge of Sydney and its influence on the country's identity. **