how many 2 digit numbers and single digit numbers can you get out of a 7 digit number, in a set of 6 numbers consisting of both s.ingle and double digit numbers with the highest number being 59 and the lowest number being number 1 using addition, and multiplication,subtraction.
Something is missing.
If the 7 digit number is 1234569 the answer will be different than if the
7-digit number is 1456789.
Since each set contains 6 numbers, and there are only 7 digits available, we
can only have 5 single digit numbers and only one double-digit number.
Every set of 6 is of this form (A,B,C,D,E,FG}, 5 single digits and 1 double-
digit number FG.
The most restrictive digit is our choice for F. So we choose it first.
If the 7-digit number were 1234569 we could choose F any of 5 ways, since the
2-digit number must not exceed 59. However if the 7-digit number were 1456789
we could choose F only 2 ways.
So if the 7-digit number were 1234569 the answer would be 5×6! but if the
7-digit number were 1456789, the answer would be 2×6!.
Can you explain it better in the thank-you note, stating it exactly
word-for-word, number-for-number the way your teacher gave it to you? If so,
I'll be glad to help you, but as it is stated here, there is no way.
Edwin