Question

Using divisibility test, determine which of the following numbers is divisible by 11? a) 8048965
b) 5445​

Answer 1

Step-by-step explanation:

Divisibility rule of 11 says that if the difference of sum of odd places digits and sum of even places digits is either 0 or 11 then the number is divisible by 11.

a). 8048965

sum of odd places digits = 8+4+9+5=26

sum of even places digits = 0+8+6= 14

Difference = 26-14=12

so, 8048965 is not divisible by 11

b). 5445

sum of odd places digits = 5+4= 9

sum of even places digits = 4+5= 9

Difference = 9-9= 0

so, 5445 is divisible by 11

Answer 2

Step-by-step explanation:

1.8048965

Even digits = 8,4,8,6

Odd digits=9,5

• Sum of even digits=26
• Sum of odd digits=14
• Divisibliity rule of 11= 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
• 26-14=12

Not divisible by 11

2.5445

Even digits = 4,4

Odd digits=5,5

• Sum of even digits=8

•Sum of odd digits=10

Divisibliity rule of 11= 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

• 10-8=2

Not divisible by 11