CAT: Logical ReasoningCoding/Decoding. Free, no login required.

Q1:

CAT 2019 Slot 1

Coding/Decoding

Easy

The following table represents addition of two six-digit numbers given in the first and the second rows, while the sum is given in the third row. In the representation, each of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 has been coded with one letter among A, B, C, D, E, F, G, H, J, K, with distinct letters representing distinct digits.

Which digit does the letter A represent?

Q2:

CAT 2019 Slot 1

Coding/Decoding

Easy

The following table represents addition of two six-digit numbers given in the first and the second rows, while the sum is given in the third row. In the representation, each of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 has been coded with one letter among A, B, C, D, E, F, G, H, J, K, with distinct letters representing distinct digits.

Which digit does the letter B represent?

Q3:

CAT 2019 Slot 1

Coding/Decoding

Easy

The following table represents addition of two six-digit numbers given in the first and the second rows, while the sum is given in the third row. In the representation, each of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 has been coded with one letter among A, B, C, D, E, F, G, H, J, K, with distinct letters representing distinct digits.

Which among the digits 3, 4, 6 and 7 cannot be represented by the letter D?

Q4:

CAT 2019 Slot 1

Coding/Decoding

Easy

The following table represents addition of two six-digit numbers given in the first and the second rows, while the sum is given in the third row. In the representation, each of the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 has been coded with one letter among A, B, C, D, E, F, G, H, J, K, with distinct letters representing distinct digits.

Which among the digits 4, 6, 7 and 8 cannot be represented by the letter G?

Q5:

CAT 2018 Slot 2

Coding/Decoding

Hard

According to a coding scheme the sentence

Peacock is designated as the national bird of India is coded as

56889993511355566785645813666689133479133665688999351135556678564581366668913347913366

This coding scheme has the following rules:

  1. The scheme is case-insensitive (does not distinguish between upper case and lower case letters).
  1. Each letter has a unique code which is a single digit from among 1,2,3,…,91,2,3, \ldots, 9.
  1. The digit 99 codes two letters, and every other digit codes three letters.
  1. The code for a word is constructed by arranging the digits corresponding to its letters in a non-decreasing sequence.

What best can be concluded about the code for the letter L?

Answer options
Option 2
Correct Answer
Explanation for CAT 2018 Slot 2 DILR question 5

Q6:

CAT 2018 Slot 2

Coding/Decoding

Hard

According to a coding scheme the sentence

Peacock is designated as the national bird of India is coded as

56889993511355566785645813666689133479133665688999351135556678564581366668913347913366

This coding scheme has the following rules:

  1. The scheme is case-insensitive (does not distinguish between upper case and lower case letters).
  1. Each letter has a unique code which is a single digit from among 1,2,3,…,91,2,3, \ldots, 9.
  1. The digit 99 codes two letters, and every other digit codes three letters.
  1. The code for a word is constructed by arranging the digits corresponding to its letters in a non-decreasing sequence.

What best can be concluded about the code for the letter B?

Answer options
Option 3
Correct Answer
Explanation for CAT 2018 Slot 2 DILR question 6

Q7:

CAT 2018 Slot 2

Coding/Decoding

Hard

According to a coding scheme the sentence

Peacock is designated as the national bird of India is coded as

56889993511355566785645813666689133479133665688999351135556678564581366668913347913366

This coding scheme has the following rules:

  1. The scheme is case-insensitive (does not distinguish between upper case and lower case letters).
  1. Each letter has a unique code which is a single digit from among 1,2,3,…,91,2,3, \ldots, 9.
  1. The digit 99 codes two letters, and every other digit codes three letters.
  1. The code for a word is constructed by arranging the digits corresponding to its letters in a non-decreasing sequence.

For how many digits can the complete list of letters associated with that digit be identified?

Answer options
Option 1
Correct Answer
Explanation for CAT 2018 Slot 2 DILR question 7

Q8:

CAT 2018 Slot 2

Coding/Decoding

Hard

According to a coding scheme the sentence

Peacock is designated as the national bird of India is coded as

56889993511355566785645813666689133479133665688999351135556678564581366668913347913366

This coding scheme has the following rules:

  1. The scheme is case-insensitive (does not distinguish between upper case and lower case letters).
  1. Each letter has a unique code which is a single digit from among 1,2,3,…,91,2,3, \ldots, 9.
  1. The digit 99 codes two letters, and every other digit codes three letters.
  1. The code for a word is constructed by arranging the digits corresponding to its letters in a non-decreasing sequence.

Which set of letters CANNOT be coded with the same digit?

Answer options
Option 2
Correct Answer
Explanation for CAT 2018 Slot 2 DILR question 8