Multiple choice Directions: Find the odd one. 7, 8, 18, 57, 228, 1165, 6996 18 57 6996 228 Reveal answer Fill a bubble to check yourself D Correct answer Explanation Let no's be a,b,c,d,e,f,g. then if a=7; b=a*1+1; c=b*2+2 and so on