Analytical Reasoning Question No. 06
A certain secure computer lab uses only the letters K, L, M, N and O as their computer codes. Words in the computer lab's code are written from left to right. Computer lab's code words are only those words that conform to the following conditions:
1. The minimum length of the computer lab's code words is two letters, not necessarily different from each other.
2. K cannot be the first in a word.
3. L must occur more than once in a word.
4. M cannot be the last letter in the word nor next to the last letter.
5. N must occur in a word if K occurs in word.
6. O cannot be the last letter in a word unless L occurs in the word.
1. Which of the following letters could be placed after O in L-O to form a computer lab's code word exactly 3 letters long.
A. K B. O C. M D. N E. L
2. If the only kinds of letters that are available are K, L and M, then the total number of different computer lab’s code words, each exactly two letters long, that it is possible to make is.
A. 1 B. 3 C. 6 D. 9 E. 12
3. Which of the following is an acceptable computer lab’s code word.
A. K, L, L, M B. L, O, M, L C. O, N, K, M
D. N, M, K, O E. M, L, L, O
4. What are the total number of different computer lab’s code words exactly three identical letters long that it is possible to make.
A. 1 B. 2 C. 3 D. 4 E. 5
5. The computer lab’s code word M, M, L, L, O, K, N can be turned into another computer lab’s code word by carrying out any one of the following changes EXCEPT.
A. Replacing every L with N
B. Replacing the 1st M with O
C. Moving the 2nd L to the immediate left of K
D. Moving O to the immediate right of N
E. Replacing the N with an O
6. Which one of the following is not a computer lab’s code word but could be turned into one by changing the order of the letters within the word.
A. K, L, M, N, O
B. L, L, L, K, N
C. M, K, N, O, N
D. N, K, L, M, L
E. O, M, M, L, L
