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Find the sum of the prime numbers between 50 and 80.

Comprehension: (Q. 85 to 89) Read the given passage and answer the questions that follow. The Smith family from South-East England were celebrating Christmas at a beach resort in southern Thailand. Tilly Smith was a ten-year-old school girl; her sister was seven years old. Their parents were Penny and Colin Smith. It was 26 December 2004. Deadly tsunami waves were already on their way. They had been triggered by a massive earthquake off northern Sumatra earlier that morning. “The water was swelling and kept coming in,” Penny Smith remembered. “The beach was getting smaller and smaller. I didn’t know what was happening.” But Tilly Smith sensed that something was wrong. Her mind kept going back to a geography lesson she had taken in England just two weeks before she flew out to Thailand with her family. Tilly saw the sea slowly rise, and start to foam, bubble and form whirlpools. She remembered that she had seen this in class in a video of a tsunami that had hit the Hawaiian Islands in 1946. Her geography teacher had shown her class the video, and told them that tsunami can be caused by earthquakes, volcanoes and landslides. Tilly started to scream at her family to get off the beach. Tilly’s parents took her and her sister away from the beach to the swimming pool at the hotel. A number of other tourists also left the beach with them. “Then it was as if the entire sea had come out after them. I was screaming, ‘Run!’’ T he family took refuge in the third floor of the hotel. The building withstood the surge of three tsunami waves. If they had stayed on the beach, they would not have been alive. The Smiths later met other tourists who had lost entire families. Thanks to Tilly and her geography lesson, they had been forewarned. Tilly went back to her school in England and told her classmates her terrifying tale. Identify the correct synonym of the word ‘deluge’ from the passage.

एक विशिष्ट भाषा संस्थान में, अंग्रेजी और स्पेनिश भाषा में पाठ्यक्रम उपलब्ध थे। कुछ छात्रों ने केवल अंग्रेजी में और कुछ छात्रों ने केवल स्पेनिश में दाखिला लिया। इस संस्थान के छात्रों के एक समूह को इनमें से किसी में भी दिलचस्पी नहीं थी, अत: उन्होने दाखिला नही लिया। शेष छात्रों में अंग्रेजी और स्पेनिश दोनों में दाखिला लिया। निम्नलिखित तार्किक आरेखों में से कौन-सा उपरोक्त स्थिति को सही ढंग से निरूपित करता है?

हड्ड़ी की कोशिकाएँ एक कठोर मैट्रिक्स में सन्निहित होती हैं, जो बनी होती है।

A sentence is given in four parts as options. One of the parts has an error of grammar or syntax. Choose the option that has the error.

Which among the following is NOT an operating system?

एक संयुक्त परिवार के 9 बच्चों की आयु का माध्य 14 वर्ष है। उनके दादा और दादी की आयु क्रमश: 71 वर्ष और 67 वर्ष है। बच्चों और दादा-दादी की आयु का माध्य ज्ञात कीजिए।

रणजी ट्रॉफी 2024 का ख़िताब किस टीम ने जीता?

केन्द्रीय कृषि विश्वविद्यालय कहाँ स्थित है ?

Q: If pq is a two-digit number, then pq – qp will be completely divisible by:

A. 9

B. 7

C. 6

D. 5

Correct Answer: Option A - Let the two digit number (pq) = 10x + y Then, qp = 10y + x According to the question, pq – qp = 10x + y – (10y + x) = 10x + y – 10y – x = 9x – 9y = 9 (x – y) Hence pq – qp will be completely divisible by 9.

A. Let the two digit number (pq) = 10x + y Then, qp = 10y + x According to the question, pq – qp = 10x + y – (10y + x) = 10x + y – 10y – x = 9x – 9y = 9 (x – y) Hence pq – qp will be completely divisible by 9.

Explanations:

Let the two digit number (pq) = 10x + y Then, qp = 10y + x According to the question, pq – qp = 10x + y – (10y + x) = 10x + y – 10y – x = 9x – 9y = 9 (x – y) Hence pq – qp will be completely divisible by 9.

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