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  1. 10 - [9 - {8 - (7 - 6)}] - 5 is equal to ?
    1. -5
    2. 1
    3. 3
    4. 9
Correct Option: C

Given expression = 10 - [ 9 - {8 - 1}] - 5
= 10 - [9 - 7] - 5
= 10 - 2 - 5
= 3


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