DAY 52

Comment

To get as a high an average mark as possible, Jake has to score 10 on the next test.
If he does, what is his total mark on the four tests?
And what, then, is his average mark on the four tests?

Answer

Five and a half.

Readers' methods

Martin of Neath, South Wales.
Say Jake scores 4, 4, 4 and 10 on the first four tests.
Then his average will be 22 over 4,
which is 5.5

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