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Please help with solution for Question 1&2
Date Posted: 7 years ago
Views: 1084
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First of all, I have to state this: Unless your child is going for Math Olympiad or something, he or she is doing the wrong book. This is A-Level standard, minimum.
Secondly, I assumed that 5 appears twice in the number 55. If this question were to ask "How many numbers from 40000 to 43000 contain the digit 5?" the working would be more complicated than it is right now, because I would need to eliminate all the double/triple counts.
Secondly, I assumed that 5 appears twice in the number 55. If this question were to ask "How many numbers from 40000 to 43000 contain the digit 5?" the working would be more complicated than it is right now, because I would need to eliminate all the double/triple counts.
Date Posted:
7 years ago
Okay, part (b) is wrong, it actually appears 190 times. Forgot to take into account two-digit numbers.
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