If a number ends with 0, then it is divisible by 10.
Example 1 :
Check whether 9470 is divisible by 10.
Solution :
The number 9470 ends with 0.
So, it is divisible by 10.
Example 2 :
Check whether 78000 is divisible by 10.
Solution :
The number 78000 ends with 0.
So, it is divisible by 10.
Example 3 :
Which of the following numbers must be added to 78 to get a number which is divisible by 10 ?
(A) 0, (B) 1, (C) 2
Solution :
78 + 0 = 78
78 + 1 = 79
78 + 2 = 80
In the above calculation, when we add 2 to 78, we get 80 which ends with 0.
Because the number 80 ends with 0, it is divisible by 10.
So, option C is correct.
Example 4 :
Which of the following numbers should be multiplied by 24 to get a number which is divisible by 10 ?
(A) 4, (B) 5, (C) 6
Solution :
4 ⋅ 24 = 96
5 ⋅ 24 = 120
6 ⋅ 24 = 144
In the above calculation, when we multiply 5 24, we get 120 which ends with 0.
Because the number 120 ends with 0, it is divisible by 10.
So, option B is correct.
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