1.1.3 Blood relations and direction sense notes

1. 1.1.3.1Blood relations: direct statements and family trees

   Blood-relation questions are solved by drawing a small family tree, starting from the speaker ("my …") and reading the chain of relations one step at a time, while marking each person's gender and generation.

   Advanced · 8 min · Full course
2. 1.1.3.2Coded blood relations and family puzzles

   In coded relations each symbol stands for one relation; decode the expression pair by pair from left to right into a family tree, take gender only from the relation words, and answer "cannot be determined" when the tree leaves gender or the link open.

   Advanced · 8 min · Full course
3. 1.1.3.3Direction sense: turns and final direction

   Give every direction an angle (North 0°, East 90°, South 180°, West 270°), count clockwise turns as plus and anticlockwise as minus, add them up, and read the final angle back as a direction.

   Advanced · 6 min · Full course
4. 1.1.3.4Distance and displacement: shortest distance and shadow problems

   Add up all the East–West moves and all the North–South moves separately; the shortest distance is √(x² + y²) and the direction comes from the signs of x and y. For shadows, the sun is in the East in the morning and in the West in the evening, and the shadow falls the opposite way.

   Advanced · 7 min · Full course
5. 1.1.3.5Mixed puzzles: blood relations with direction, seating or profession clues

   A mixed puzzle is two small puzzles joined by names: solve the family tree first, then use it to place people on the map, row, circle or profession list, and answer from both drawings together.

   Advanced · 10 min · Full course

Medha AI is an independent preparation service. It is not affiliated with, endorsed by or connected to APPSC, TSPSC, MPSC, UPSC or any other commission or government body.