TCS Company Numerical Ability Permutation and Combination

A 3 3 grid is colored using red and blue
colors such that if we rotate the grid about
its center in the plane by 180 degrees, the
grid looks the same. The number of ways

Read Solution (Total 2)

Ans : 32
1 2 3
4 5 6
7 8 9
after 180 degree rotation
9 8 7
6 5 4
3 2 1

1 -----> 9 = 2 ways
2 -----> 8 = 2 ways
3 -----> 7 = 2 ways
4 -----> 6 = 2 ways
5 -----> 5 = 2 ways

2*2*2*2*2 = 32 ways
3 years agoHelpfull: Yes(2) No(1)

Each Gird can place to one to another and same corner represented in the same color: Possibility is 2X2X2X2X2=32
3 years agoHelpfull: Yes(0) No(0)

TCS Other Question

In the normal course, Rakesh, Sanket and Mukesh can each individually build a wall in 10,16 and 20 days respectively. Due to difficult terrain and slushy conditions at the site, the individual time required for each to complete the work has increased by 20%, 25% and 50% respectively. How long will they take to build the wall if they work together?
1)6 days 2)8 days 3)4 days 4)5½ days A^B means A raised to the power B.
If f(x) = ax^4 - bx^2 + x + 5 and f(-3) = 2, then f(3) = ?
1)3 2)8 3)-2 4)1