Eric Nicholas K's answer to kim Yeon Jae's Junior College 1 H1 Maths Singapore question.

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Eric Nicholas K
Eric Nicholas K's answer
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Forgotten my JC stuff already. I could be wrong for this question.
J
J
5 years ago
For case 1 , 900 is eliminated not due to repetition but rather due to the condition that 900 < number < 8000. The range to be considered should be 905 to 995