What happens to the middle digit 'b' when a 3-digit number 'abc' is subtracted by 'cba'?

Type: MCQ • Marks: 1

A. It cancels out completely

B. It is multiplied by 10

C. It doubles

D. It becomes zero always

Explanation

(100a + 10b + c) - (100c + 10b + a) = 99a - 99c. The 10b term cancels out completely.

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Class 7th Ganita Prakash 1

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