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UPSC Prelims

Mathematics

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Elementary Algebra / प्रारंभिक बीजगणित

Q63 2016, Elementary Algebra

A person is standing on the first step from the bottom of a ladder. If he has to climb 4 more steps to reach exactly the middle step, how many steps does the ladder have?

एक व्यक्ति सीढ़ी के तल से पहले पायदान पर खड़ा है। ठीक बीच वाले पायदान तक पहुंचने के लिए अगर उसे 4 पायदान और चढ़ने पड़ें, तो सीढ़ी में कितने पायदान हैं

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Person is standing on first step and middle step is 4 step ahead.

Therefore middle step is the 5th step. Now top step will also be 4 step ahead of the middle step.

Top step = 5 + 4 = 9 steps

Total no. of steps in the ladder = 9.

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