Dainik Vigyan Pariksha 20-20 (दैनिक विज्ञान परीक्षा 20-20), written by Dr Rajeev 'Lekhak' and published by Disha under its Gyan Sangrah Series, covers everyday science for competitive examinations. The complete book is written in Hindi (Devanagari script), so aspirants preparing in the Hindi medium can study the subject in their own language. This is the 11th Edition. The book gives chapter-wise explanations of examination questions up to July 2025 and includes 38 new question papers with explanations (जुलाई, 2025 तक के 38 नये प्रश्न-पत्रों के साथ व्याख्या सहित). The content is a digest of the RBSE and NCERT textbooks presented in explanatory form (RBSE एवं NCERT पाठ्यपुस्तकों का सार, व्याख्यात्मक रूप में). Everyday science is drawn almost entirely from the school texts, and the questions test applied understanding — why a phenomenon happens, what a substance is used for, which vitamin or disease matches which description. A textbook digest with the actual questions attached covers both sides of that in one volume. It is prepared for Grade I, II and III Teacher, LDC, CET, REET, RAS, PSI, Prayogshala Sahayak and Constable examinations. Key Features: Written entirely in Hindi (Hindi medium) for competitive examination aspirants Complete everyday science in one volume 11th Edition Chapter-wise explanations of examination questions up to July 2025 38 new question papers with explanations included Digest of RBSE and NCERT textbooks in explanatory form For Grade I, II and III Teacher, REET and LDC examinations For CET, RAS and PSI examinations For Prayogshala Sahayak and Constable examinations Fast Track of Success approach By Dr Rajeev 'Lekhak', from the Disha Gyan Sangrah Series यह पुस्तक "दैनिक विज्ञान परीक्षा 20-20" डॉ. राजीव 'लेखक' द्वारा लिखित है तथा दिशा (ज्ञान संग्रह सीरीज़) द्वारा प्रकाशित है। यह पूर्णतः हिंदी भाषा (Hindi medium) में है। यह 11वाँ संस्करण है। इसमें जुलाई, 2025 तक के 38 नये प्रश्न-पत्रों की व्याख्या सहित तथा RBSE एवं NCERT पाठ्यपुस्तकों का सार व्याख्यात्मक रूप में दिया गया है। यह I, II एवं III ग्रेड शिक्षक, LDC, CET, REET, RAS, PSI, प्रयोगशाला सहायक तथा कॉन्स्टेबल परीक्षाओं के अभ्यर्थियों के लिए अत्यंत उपयोगी है।