Which pair of numbers comes next 40 40 31 31 22 22 13?
13 4
13 5
4 13
9 4
4 4
Correct Answer : A
Look at this series: 15, __, 27, 27, 39, 39,...What number should fill the blank?
Which pair of numbers comes next 13 29 15 26 17 23 19
Which pair of numbers comes next 7 9 66 12 14 66 17