# NCERT Mathematics Lectures Study Material for IAS-Updated for 2021-2022 Changes

## IAS: GS/Current-Affairs Articles, Notifications, Dates & More

• ### 1🌟📹IAS Prelims CSAT Paper 4-October 2020 Solutions and Video Explanations Part 4 (of 4) - Q 61 to 80 (PDF) [ IAS Upd. ]

Get unlimited access to the best preparation resource for IAS Mains - notes for optional and GS along with model answers - practice your way to success.

## Video Explanations

61. What is the…

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• ### 2📹IAS Prelims CSAT Paper 4-October 2020 Solutions and Video Explanations Part 3 (of 4) - Q 41 to 60 (PDF) [ IAS Upd. ]

Get unlimited access to the best preparation resource for IAS Mains - notes for optional and GS along with model answers - practice your way to success.

## Video Explanations

41. A person X c…

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• ### 3📹IAS Prelims CSAT Paper 4-October 2020 Solutions and Video Explanations Part 2 (of 4) - Q 21 to 40 (PDF) [ IAS Upd. ]

Get unlimited access to the best preparation resource for IAS Mains - notes for optional and GS along with model answers - practice your way to success.

## Video Explanations

21. In the sum

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## Video Explanations

1. A man Walks down the backside of his house straight 25 metres, then turns to the right and walks 50 metres again; then he turns towards left and again walks 25 metres.…

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• ### 5📹IAS Prelims GS Paper 4 October 2020 Solutions and Video Explanations Part 5 (of 5)- Q 81 to 100 (PDF) [ IAS Upd. ]

Get unlimited access to the best preparation resource for IAS Mains - notes for optional and GS along with model answers - practice your way to success.

## Video Explanation

81. With reference to Fo…

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• ### 6🌟📹IAS Prelims GS Paper 4 October 2020 Solutions and Video Explanations Part 4 (of 5)- Q 61 to 80 (PDF) [ IAS Upd. ]

Get unlimited access to the best preparation resource for IAS Mains - notes for optional and GS along with model answers - practice your way to success.