Without actual division show that each of the following numbers is divisible by 5:

(i) 55
(ii) 555
(iii) 5555
(iv) 50005

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Solution

A number will be divisible by 5 if the unit's digit of that number is either 0 or 5.

(i) In 55, the unit's digit is 5. Hence, it is divisible by 5.

(ii) In 555, the unit's digit is 5. Hence, it is divisible by 5.

(iii) In 5,555, the unit's digit is 5. Hence, it is divisible by 5.

(iv) In 50,005, the unit's digit is 5. Hence, it is divisible by 5.

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Without actual division show that each of the following numbers is divisible by 5: (i) 55 (ii) 555 (iii) 5555 (iv) 50005

Without actual division show that each of the following numbers is divisible by 5:

(i) 55
(ii) 555
(iii) 5555
(iv) 50005