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Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 7

Find the unit digit of the following numeric expression. 1000010000 + 1111111111 - Mathematics

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Question

Find the unit digit of the following numeric expression.

1000010000 + 1111111111

Sum

Solution

1000010000 + 1111111111

In 1000010000 the unit digit of base 10000 is 0 and power is 10000

Unit digit of 1000010000 is 0

In 1111111111 the unit digit of base 11111 is 1 and power is 11111

Unit digit of 1111111111 is 1

Unit digit of 1000010000 + 1111111111 is 0 + 1 = 1

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Unit Digit of Numbers in Exponential Form
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Chapter 3: Algebra - Exercise 3.2 [Page 57]

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Samacheer Kalvi Mathematics - Term 2 [English] Class 7 TN Board
Chapter 3 Algebra
Exercise 3.2 | Q 4. (ii) | Page 57
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