5×555 a Multiple of 9 ? - Mathematics

Sum

5 × 555 a multiple of 9?

Solution

Sum of the digits of 5 × 555

= 5 + x + 5 + 5 + 5 = 20 + x

It is multiple by 9

The sum should be divisible by 9

Value of x will be 7

Concept: Tests for Divisibility of Numbers - Divisibility by 3

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Chapter 5: Playing with Numbers - Exercise 5 (D) [Page 62]

Q 9 Q 8 Q 10

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Selina Concise Mathematics Class 8 ICSE

Chapter 5 Playing with Numbers
Exercise 5 (D) | Q 9 | Page 62

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5×555 a Multiple of 9 ? - Mathematics

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