3. Find the missing number

4. Find the wrong number in the series.

1, 2, 6, 15, 31, 56, 91

5. If white is called black, black is called red, red is called yellow, yellow is called green, green is called blue, blue is called violet and violet is called orange, what would be the colour of human blood?

6. Find the number of triangles in the given figure

 

7. Find the minimum number of straight lines required to make the given figure.

8. Find the missing number

9. Select the letter-cluster that can replace the question mark (?) in the following series.
ABC, ACE, ADG, ? , AFK

10. Ali is taller than Raman but shorter than Maria. Sumit is the shortest. Zaid is taller than Sumit but shorter than Raman. Who is the tallest?