The Indian Constitution was adopted on January 26, 1950, which is celebrated as Republic Day.

Telangana was formed on June 2, 2014, by separating from Andhra Pradesh, becoming India's 28th state.

Nitrogen (N₂) comprises approximately 78% of Earth's atmosphere, making it the most abundant gas.

Selling price = Cost price + (25% of Cost price) = 400 + (0.25 × 400) = 400 + 100 = ₹500

Average speed = Total distance / Total time = 300 km / 5 hours = 60 km/h

Total savings in 3 years = ₹5,000 × 12 × 3 = ₹5,000 × 36 = ₹1,80,000

Viswanathan Anand became the first Indian to win the World Chess Championship in 2007, defeating Vladimir Kramnik.

Neeraj Chopra won India's first individual gold medal in an Olympic track and field event with a throw of 87.58m.

ISRO's headquarters is in Bengaluru (formerly Bangalore), which is also known as India's Silicon Valley.

15% of x = 45. Therefore, x = 45 × (100/15) = 45 × (20/3) = 300.