Question

the sum of five consecutive even number is 660 . what is sum of greatest and smallest among them

Answer 1

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264

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In such questions you must begin bt assuming the number be variables.

Since consecutive even numbers differ by 2, let us assume the five consecutive numbers to be as follows,
x, ( x + 2 ), ( x + 4 ), ( x + 6 ) and ( x + 8 )

According to the question,

Sum of these numbers = 660

x + ( x + 2 ) + ( x + 4 ) + ( x + 6 ) + ( x + 8 ) = 660
x + x + 2 + x + 4 + x + 6 + x + 8 = 660
5x + 20 = 660
5x = 660 - 20
5x = 640
x = 640 / 5
x = 128

Therefore,

The numbers will be 128, 130, 132, 134 and 136.

Greatest Number = 136
Smallest Number = 128

The sum of greatest and smallest number = 136 + 128

The sum of greatest and smallest number = 264

Answer 2

264

Step-by-step explanation:

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