What will be the next number - 52 , 63 , 94 , 46 , ??

Question

Which number will replace the "?" and complete the sequence?

1; 1; 2; 4; 3; 9; 4; 61; 5; 52; 6; 63; 7; ?

Answer 1

52 -> 25 -> 5^2
63 -> 36 -> 6^2
94 -> 49 -> 7^2
46 -> 64 -> 8^2

so next number should be
18 (81 -> 9^2)

Answer 2

**18**

explanation: reversing digits of each number, you will get 5*5, 6*6, 7*7, 8*8, therefore next will be reverse of 9*9