Do
Make 3 different 3 digit numbers using 1,9 and 8, where each digit can be used only once.
Check which of these number

2 thoughts on “Do<br />Make 3 different 3 digit numbers using 1,9 and 8, where each digit can be used only once.<br />Check which of these number”

1. Answer:

   198, 891, 918 – all divisible by 9

   Explanation –

   There is a trick which helps you see the divisibility of 9, which is – if the sum of the digits is divisible by 9, the number is divisible by 9.

   So, all of these digits have the same sum, which is 18, and 18/9=2

   therefore, we can see that all of these numbers are divisible by 9. Check it on a calculator if you aren’t sure 🙂

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2. Answer:

   198

   891

   918

   All the numbers will be divisible by 9.

   Divisibility rule of 9 :-

   Add all the digits, and the sum should be divisible by 9.

   In all the cases, the sum is the same i.e. 18.

   Hence, all are divisible by 9.

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