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Which is the coldest planet in the solar system?

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Important Questions on Sets, Relations and Functions

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Name the first artificial satellite sent by Russia in space.
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The pole star appears to be stationary when observed from the earth. This is because pole star is :
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Which is called Earth's satellite?
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Write the name of Red Planet.
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The earth takes 1 year to make a complete revolution around the sun whereas Pluto takes nearly 248 of our earth years to orbit the sun. What is the main reason for this?

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What is a Solar System? Write the names of all the planets in our Solar System.
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How many planets have rings around them?
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If A={x|x∈N,x is a prime number less than 12} and B={x|x∈N , x is factor of 10}, then A∩B=…
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What is the name of 400 km thick bright layer around the sun?

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The planet nearest to the Sun is
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What is the name of the natural satellite of the earth? How would have this natural satellite originated? Mention its two importance for earth.
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Which of the following is not a natural satellite?

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Write the name of the first astronaut. Which facilities are available to solve the problem of food and living in Weightlessness on International Space Station.
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What is an artificial satellite? Name any two types of artificial satellite and state their functions.

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Let A={ 1,2,3,4,5,6,7,8,9,10 }. Then the number of subsets of A containing two or three elements is
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In a group of boys, 25 play volleyball, 20 play badminton and 10 boys play cricket. Five boys play all the three games. 8 boys play atleast two of the three games. How many of them play only one game? 
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In an examination 51% students fail in English and 45% fail in Maths. If 21%students fail in both the subjects, then 169 students pass the examination. What is the total number of students taking the exam?
 
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What is the mass of the moon?
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Which satellite is used for geographical survey?

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Why do tail of comets formed, when it comes closer to sun?