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For The Mathematically Inclined

Anil Saigal

Problem 1: 

3/4 of the length of a 8/9 m rod is painted red. 5/8 of the rest of the rod is painted blue and the remaining section is not painted. What length of the rod is not painted?  

Problem 2:

Cos ( 2 π  - α )  =   ? 


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Problems from M-07/15/21

Problem 1: 

Calculate 7!! (double factorial). 

Problem 2:

Solve (without a calculator) Sqrt ( 542 x 11 - 11 x 452  ).

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