Question

If 3125 is a multiple of 9, where 'z' is a digit, what is the value of z?​

Answer 1

Answer:

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Step-by-step explanation:

31z5 is divisible by 9. ∴ (9 + z) must be equal to 0, or 9 or 18 or 27, ... But z is a digit. ∴ 9 + z = 0 or 9 + z= 18 If 9 + z = 0, then z = 0 and if 9 + z = 18, then z = 9