BEGINNER

feet to miles: http://www.codeskulptor.org/#user41_3IQDqe5TdS_0.py

time to seconds: http://www.codeskulptor.org/#user41_8WH60Qq2zV_0.py

rectangle perimeter: http://www.codeskulptor.org/#user41_ZYr0udrjt3_1.py

rectangle area: http://www.codeskulptor.org/#user41_6DbQZ73cC5_0.py

circumference: http://www.codeskulptor.org/#user41_bk6vVOcE8C_0.py

area: http://www.codeskulptor.org/#user41_HE2zORNbJI_0.py

INTERMEDIATE

interest: http://www.codeskulptor.org/#user41_6wIwja24iB_0.py

name tag: http://www.codeskulptor.org/#user41_wKJfs1NdG7_0.py

ADVANCED

age and name: http://www.codeskulptor.org/#user41_RSxCVHS3Fp_0.py

distance: http://www.codeskulptor.org/#user41_xwKuWTUwr4_0.py

CHALLENGE

triangle area: http://www.codeskulptor.org/#user41_Tsw0eIwKHL_1.py