The average of 7 consecutive numbers is 20. The largest of these numbers is :
Let the numbers be `x, x + 1, x + 2, x + 3, x + 4, x + 5 and x + 6
Then, `(x + (x + 1) + (x + 2) + (x + 3)+ (x + 4) + (x + 5) + (x + 6))/(7)` = 20
or `7x` + 21 = 140 or `7x` = 119 or `x` = 17
`:.` Largest number = `x` + 6 = 23.
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