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Coding and decoding
8 MDCAT Logical reasoning questions with answers and explanations.
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If CAT is written as DBU in a code, how is DOG written in the same code?
- 1 EPH
- 2 EOH
- 3 CNF
- 4 EPG
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Correct answer: EPH
Each letter moves one place forward in the alphabet. D becomes E, O becomes P and G becomes H.
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If A = 1, B = 2, C = 3 and so on, what is the sum of the code values for the word BED?
- 1 9
- 2 11
- 3 12
- 4 14
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If MANGO is written as NBOHP, how is APPLE written in the same code?
- 1 BQQMF
- 2 BPPMF
- 3 CQQNG
- 4 BQQLF
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Correct answer: BQQMF
Each letter moves one place forward. A, P, P, L, E become B, Q, Q, M, F.
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In a code, 2 stands for 4, 3 stands for 9 and 4 stands for 16. What does 6 stand for?
- 1 12
- 2 24
- 3 36
- 4 18
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How is the word LOGIC written when its letters are written in reverse order?
- 1 CIGOL
- 2 CIGLO
- 3 CGIOL
- 4 LOGIC
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Correct answer: CIGOL
Reading the letters of LOGIC from the end gives C, I, G, O, L.
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In a code, A is written as Z, B as Y and C as X, so each letter is replaced by its mirror letter. How is CAB written?
- 1 XYZ
- 2 XZY
- 3 ZYX
- 4 YXZ
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Correct answer: XZY
C becomes X, A becomes Z and B becomes Y, which gives XZY.
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In a certain code, + means multiply, - means add, and x means subtract. What is the value of 4 + 3 - 2?
- 1 10
- 2 12
- 3 14
- 4 9
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Correct answer: 14
Replacing the signs gives 4 x 3 + 2. That is 12 + 2 = 14.
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In a certain language, red is called blue, blue is called green and green is called yellow. What would the colour of grass be called?
- 1 Green
- 2 Blue
- 3 Red
- 4 Yellow
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Correct answer: Yellow
Grass is green, and green is called yellow in this language.