Question
If a number 3A98 is divisible by 11, find the value of A. [4 MARKS]
Answer:
:
Concept: 1 Mark
Steps: 2 Marks
Answer: 1 Mark
To check the divisibility of a number by 11, the rule is to find the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number. If the difference is either 0 or divisible by 11, then the number is divisible by 11.
3+ 9 = 12, A + 8
A + 8 - 12 = 0
A - 4 = 0 or A -4 = 11
A = 4 or A= 15, A = 15 is not possible.
So, the number is 3498.
Was this answer helpful ?
:
Concept: 1 Mark
Steps: 2 Marks
Answer: 1 Mark
To check the divisibility of a number by 11, the rule is to find the difference between the sum of the digits at odd places (from the right) and the sum of the digits at even places (from the right) of the number. If the difference is either 0 or divisible by 11, then the number is divisible by 11.
3+ 9 = 12, A + 8
A + 8 - 12 = 0
A - 4 = 0 or A -4 = 11
A = 4 or A= 15, A = 15 is not possible.
So, the number is 3498.
Was this answer helpful ?
More Questions on This Topic :
Question 2. Define odd numbers. [1 MARK]....
Question 6. What do you mean by prime factorization?....
Latest Videos
Latest Test Papers
Submit Solution