Question

The average of 4 consecutive even number is 45 find the third of those numbers

Answer 1

As Consecutive even no/s they differ each by 2 and so,

Let the first term be a.

Then According to Question,

(a) + (a+2) + (a+4) + (a+6) / 4  = 45

                                    4 a + 12 = 45 × 4

                                            4 a = 180 - 12

                                                a = 42.

Then the third number = (a+4)

                                    = 42 + 4

                                    = 46
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