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कब संयुक्त प्रांत का नाम बदल कर उत्तर प्रदेश किया गया था?

The ratio of milk and water in two vessels is 2:3 and 7:3. Find the ratio of milk and water in the new mixture obtained by mixing the mixture of both the vessels pots (in the third now vesel).

Identify the correct statement about the cell membrane -

मई 2025 में किस राज्य द्वारा ‘सहयोग’ पहल की शुरुआत की गई?

किसी वस्तु को 25% की छूट पर बेचने से 15% की हानि होती है। यदि वस्तु को उसके अंकित मूल्य पर बेचा जाता, तो कितने प्रतिशत लाभ प्राप्त होता? [2 दशमलव स्थान तक पूर्णांकित उत्तर दीजिए़]

The population of a town increased by 10% and 20% in two successive years, but decreased by 25% in the third year. Find the ratio of the population in the third year to that of 3 year ago.

Which of the following errors occurs due to the tape not being held truly horizontal during measurment?/निम्नलिखित में से कौन सी त्रुटि मापन के दौरान फीते को सही से क्षैतिज नहीं पकड़ने के कारण प्राप्त होती है?

–––––– फूल की पत्तियां किसी विलयन में अम्ल या क्षार की उपस्थिति का संकेत नहीं देती हैं।

Comprehension : Read the passage carefully and choose the best answer to each question out of the four alternatives. The Brazil nut tree is one of the Amazon's longest living trees, of an age of 1,000 years. Its flowers depend on bees for pollination. Once pollinated, a coconut-sized seed containing some tiny 20 seeds, develops for over 15 months before falling to the forest floor. They are found exclusively in Amazon forests and harvesting is exhausting, even for the strong. Apart from bees and the Brazil nut harvesters, the life of many other plants and animals is intertwined with this tree. The empty seeds fill with rainwater and provide breeding grounds for flies, frogs, all of which depend on these small ponds on the forest floor. The major threat to the trees is forest clearing. Sustainable harvesting of Brazil nuts is therefore vital way to provide protection of forests and saving the Amazon. According to the passage, which of the following option is incorrect? Choose one option.

एक रेलगाड़ी 180 km/h की चाल से चलती है, तो इसकी चाल को m/s में व्यक्त कीजिए।