NCERT Figure it Out 4 - Q1 - Number Play
Question: If 31z5 is a multiple of 9 (z a digit), find z. Why are there two answers?
Answer: z = 0 or z = 9.
Full step-by-step NCERT solution with diagrams on Something by Zero.
Question: If 31z5 is a multiple of 9 (z a digit), find z. Why are there two answers?
Answer: z = 0 or z = 9.
Full step-by-step NCERT solution with diagrams on Something by Zero.