Math test for 7 year old

[Alexchin]

Hi expert, i need advise for my daughter (7 years) test. For me,her answer are correct. But cross/incorrect by her teacher.

The question is : make three different 3-digit numbers using digits below. Each digit cannot be used more than once in each set of numbers. (4), (7), and (1).

My daughter answers 471, 714 and 147. Her teacher answer 444, 777, 111.
Attached for details.

Please advise. Many thanks. Alex

 

[Deleted member 4993]

Hi expert, i need advise for my daughter (7 years) test. For me,her answer are correct. But cross/incorrect by her teacher.

The question is : make three different 3-digit numbers using digits below. Each digit cannot be used more than once in each set of numbers. (4), (7), and (1).

My daughter answers 471, 714 and 147. Her teacher answer 444, 777, 111.
Attached for details.

Please advise. Many thanks. Alex

Your daughter's answers are correct.
The teachers "answers" are so misguided - those are not even wrong!!!

 

[tkhunny]

Seriously, what does "cannot be used more than once" mean?

147
174
417
471
714
741

Those are your candidates.

 

[mmm4444bot]

Each digit cannot be used more than once in each set of numbers.

That phrase seems ambiguous.

Here's a set of numbers: 111, 444, 777

Here's another set of numbers: 147, 471, 714

If the author was trying to state that no digit may be used more than once in each 3-digit number, they botched it.

The teacher seems to have interpreted the sloppy wording as, "Each digit may not appear in more than one number".

This exercise is flawed.