A four digit number 4ab5 is divisible by 55. Then determine the value of b-a.
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A four digit number 4ab5 is divisible by 55. Then determine the value of b-a.
A four digit number 4ab5 is divisible by 55. Then determine the value of b-a.
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Answer:
A four digit numb
If a number is divisible by 55 than it must alsobe divisible by factors of 55 that is 5 and 11. ∴ By divisibility test of 11 difference of the sum of the alternate digits must be a multiple of 11. ⇒ b – a – 1 = 0 ( least value of b – a). Therefore option (b) is correct.
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