- 39
- 49
- 59
- 69
- b
-
1,4,9,16,25,36,_____
1+3=4
4+5=9
9+7=16
16+9=25
25+11=36
36+13=49
49+15=64
1,4,9,16,25,36,_____
1+3=4
4+5=9
9+7=16
16+9=25
25+11=36
36+13=49
49+15=64