The answer to the first one is D. The numbers are being decreased by 6. The answer to the second one is A. The numbers are being multiplied by 10.
1. subtract 6 each time
10-6 =4
4-6 = -2
-2 -6=-8
-8 -6 =-14
-14-6=-20
Choice D
2. Multiply by 10
2*10 =20
20* 10 = 200
200* 10 =2000
2000* 10 =20,000
20,000* 10 =200,000
Choice A