Question

complete the series
81,72,65, 60,57,?​

Answer 1

Answer:

56

Step-by-step explanation:

because it is coming in the order of subtracting the odd numbers in sequence.

81-72=9

72-65=7

65-60 =5

60-57=3

57-1=56 it is coming in odd numbers

Answer 2

The missing element or the last element in the series is 56.

Step-by-step explanation:

Let us first find out the pattern of series and assuming the last number of the series as 'x' .

Taking difference of a two consecutive terms,

81 -72 = 9

72 - 65 = 7

65 - 60 = 5

60 - 57 = 3

Here the difference between the two consecutive elements keeps on decreasing by 2. Therefore ,

57 - x = 1

Solving the above equation ,

57  - 1 = x

56 = x

So the complete series is 81, 72, 65, 60, 57, 56