CAT
Exam
Numerical Ability
Trigonometry
Figure shows an equilateral triangle of side of length 5 which is divided into several unit triangles. A valid path is a path from the triangle in the top row to the middle triangle in the bottom row such that the adjacent triangles in our path share a common edge and the path never travels up (from a lower row to a higher row) or revisits a triangle. An example is given below. How many such valid paths are there?
Read Solution (Total 3)
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- given side length=5 .....so (n-1)!=(5-1)!=4!
ans is 24 - 10 years agoHelpfull: Yes(9) No(1)
- 24 such paths are possible.
- 10 years agoHelpfull: Yes(2) No(1)
- how to solve this logically
- 9 years agoHelpfull: Yes(0) No(1)
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