8:512::9:?

Find the number of triangles in the adjoining figure.

A man facing south turns to his left and walk 10m,then he turns to his right and walk 15m, again he turns to his left and walk 5m and then he turns to his left and walk 15m. In which direction he is facing now

2,5,10,17,26,?

ACE, GIK, ? , SUW, YAC

Select the option in which frame a is embedded.