Geometry Puzzle Questions!?

Question

1:18,46,94,63,52,61,? what comes next

4: 4,8,61,221,244,884,? What comes next?

7: 2,3,6,1,8,6,8,4,8,4,8,3,2,3,2,3,? Whats after the 3.

& please tell me how you solved these questions

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Answer 1

q1

18,46,94,63,52,61,? what comes next

18 (+28) 46 (+48) 94 (-31) 63 (-11) 52 (+9) 61 (+A?) B?

A = 29, B = 61 + 29 = 90

but it is just 81, 64, 49, 36, 25, 16, (9 or 09), (4 or 04)....

so i'm not sure if the answer is 9 or 90?

i think 9 is more likely.

T(n) = digits written backward[(10-n)^2]

q4

double the previous and change the digits arrangement (backwards).

4*2 = 8 -> 8

8*2 = 16 -> 61

61*2 = 122 -> 221

221*2 = 442 -> 244

244*2 = 488 -> 884

884*2 = 1768 -> 8671

answer = 8671

q7

2,3,6,1,8,6,8,4,8,4,8,3,2,3,2,... Whats after the 2, right?

2*3 = 6 (2,)

3*6 = 18 (3,6,1,8,)

6*8 = 48 (6,8,4,8,)

4*8 = 32 (4,8,3,2,)

3*2 = 6 (3,2,6,)

answer = 6