| # | Question | Answer | Reasoning |
|---|---|---|---|
| 1 | 8,0.5,16,4,15,0.3,50,4.5,6,0.2,30,? | 1.2 | x,y,(x/y),(x*y) |
| 2 | 9,4,16,6,36,21,441,? | 421 | x,(x-5),(x-5)^2 |
| 3 | 4,2,5,9,5,11,13,7,16,17,9,? | 21 | x,(x-2),(x+1);y, (y-4),(y+2);… |
| 4 | 33,8,41,46,21,67,72,47,119,124,? | 99 | x,y,(x+y),(x+y+5),(2y+5) |
| 5 | 3,2,1,4,5,4,1,0,6,3,? | x,y,(x-y),(2x-y),(x+y),(2x-y),… | |
| 6 | 30.5,31,30,0,67.2,67,70,100,183.9? | 184 | x,rounded(x),re-rounded(x),re-re-rounded(x); |
| 7 | 48,24,35,7,16,8,75,15,80,40,? | -1 | x,(x/2),y,(y/5) and (x+x/2+y+y/5=114) |
| 8 | 1.8,3,0,6,2.5,5,0.5,3.4,2,1.7,4.8,6,? | 0.8 | x,y,(x/y); |
| 9 | 1370,1320,1070,-180,? | 6430 | x,x-50,x-50-250,x-50-250-1250,… |
| 10 | 49,7,98,16,4,48,9,3,36,25,5,? | 125 | x,Vx,x*2;y,Vy,y*3;… |
http://www.m4maths.com/13759-1-8-0-5-16-4-15-0-3-50-4-5-6-0-2-30-2-9-4-16.html