Question

Using divisibility tests, determine which of the following numbers are divisible by 11: (a) 545 (b) 10824 (c) 7138965 (d) 70169308 (e) 10000001( f )901153 ​

Answer 1

Answer:

10824, 70169308 and 10000001 are divisible by 11

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Answer 2

Answer:

a) 5+5-4=6 No

b)1+8+4-0+2=11 yes

c)5+9+3+7-6+8+1=9 No

d)7+1+9+0-0+6+3+8= 0 Yes

e)1-1=0 Yes

f)9+1+5-0+1+3=11 Yes

The divisibility by 11 rule states that if the difference between the sum of the digits at the odd and even places equals 0 or divisible by 11, then the number is divisible by 11.