English

Three bells toll together at intervals of 9, 12, 15 minutes. If they start tolling together, after what time will they next toll together?

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Question

Test the divisibility of 5869473 by 11.

Sum
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Solution

5869473
A number is divisible by 11 if the difference of the sums of the digits at the odd places and that at the even places (starting from one  place) is either 0 or a multiple of 11.

Sum of the digits at even places = 7 + 9 + 8
= 24
Sum of the digits in odd places = 3 + 4 + 6 + 5
= 18
Difference = 24−18
= 6
Since 6 is not divisible by 11, 5869473 is not divisible by 11.

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Chapter 2: Factors and Multiples - Test Paper 2 [Page 43]

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R.S. Aggarwal Mathematics [English] Class 6
Chapter 2 Factors and Multiples
Test Paper 2 | Q 1 | Page 43
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