If a 2-digit number 'ab' is reversed to form 'ba', what is the sum of (ab + ba)?

Type: MCQ • Marks: 1

A. 11(a - b)

B. 10(a + b)

C. 11(a + b)

D. 9(a - b)

Explanation

ab + ba = (10a + b) + (10b + a) = 11a + 11b = 11(a + b). Always divisible by 11.

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Class 7th Ganita Prakash 1

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