If 31z5 is a multiple of 9, where z is a digit, what is the value of z?
Answers
Answered by
12
Step-by-step explanation:
We have 3 + l + z + 5 = 9 + z
∵ 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.
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Answered by
0
Answer:
It can be 0 or 9.
Hope it helps !!
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