Brain Teasers & Puzzles
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There is one four-digit whole number n, such that the last four digits of n2 are the original number n
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In a school, 280 students studied chemistry, 254 students studied physics and 280 students studied biology.
97 students studied chemistry as well as physics, 138 students studied physics as well as biology and 152 students studied chemistry as well as biology.
73 students studied all the three branches.
Can you find out the total number of students?
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You throw me out when you want to use me and you take me in when you don\’t want to use me.
Who Am I?
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A fresher was sitting in an interview. The interviewer said, “This is the last question of your interview. Tell me the accurate position of the centre of this table where your resume is kept.”
How can he answer this question? What will you have answered to such a question?
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What is the relationship between these matchstick pictures below?
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