Explanations:The question asks us to find pairs of letters in the word 'CHAIRS' that have the same number of letters between them in the word as in the alphabet. To solve this, we need to compare the relative positions of each pair of letters in the word with their positions in the alphabet.
First, let's list the positions of each letter in the word 'CHAIRS':
- C is the 1st letter.
- H is the 2nd letter.
- A is the 3rd letter.
- I is the 4th letter.
- R is the 5th letter.
- S is the 6th letter.
Next, we need to consider the positions of these letters in the alphabet:
- C is the 3rd letter.
- H is the 8th letter.
- A is the 1st letter.
- I is the 9th letter.
- R is the 18th letter.
- S is the 19th letter.
Now, we will check each pair of letters in the word 'CHAIRS' to see if the number of letters between them in the word matches the number of letters between them in the alphabet.
1. Pair 'C' and 'I':
- In the word 'CHAIRS', there are 3 letters between 'C' and 'I' (H, A, R).
- In the alphabet, there are 3 letters between 'C' and 'I' (D, E, F, G, H).
- Therefore, this pair meets the criteria.
2. Pair 'A' and 'R':
- In the word 'CHAIRS', there are 4 letters between 'A' and 'R' (I, R, S).
- In the alphabet, there are 4 letters between 'A' and 'R' (B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q).
- Therefore, this pair also meets the criteria.
3. Other pairs:
- 'C' and 'H': In the word, there is 1 letter between them (A). In the alphabet, there are 4 letters between them (D, E, F, G). This pair does not meet the criteria.
- 'C' and 'A': In the word, there are 2 letters between them (H, I). In the alphabet, there are 2 letters between them (B, C). This pair does not meet the criteria.
- 'C' and 'R': In the word, there are 4 letters between them (H, A, I, S). In the alphabet, there are 15 letters between them (D, E, F, G, H, I, J, K, L, M, N, O, P, Q, S). This pair does not meet the criteria.
- 'C' and 'S': In the word, there are 5 letters between them (H, A, I, R). In the alphabet, there are 16 letters between them (D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, T). This pair does not meet the criteria.
- 'H' and 'A': In the word, there is 1 letter between them (I). In the alphabet, there are 6 letters between them (I, J, K, L, M, N). This pair does not meet the criteria.
- 'H' and 'I': In the word, there are 2 letters between them (A, R). In the alphabet, there are 0 letters between them. This pair does not meet the criteria.
- 'H' and 'R': In the word, there are 3 letters between them (A, I, S). In the alphabet, there are 10 letters between them (I, J, K, L, M, N, O, P, Q, S). This pair does not meet the criteria.
- 'H' and 'S': In the word, there are 4 letters between them (A, I, R). In the alphabet, there are 11 letters between them (I, J, K, L, M, N, O, P, Q, R, T). This pair does not meet the criteria.
- 'A' and 'I': In the word, there is 1 letter between them (R). In the alphabet, there are 7 letters between them (B, C, D, E, F, G, H). This pair does not meet the criteria.
- 'A' and 'S': In the word, there are 3 letters between them (I, R). In the alphabet, there are 17 letters between them (B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R). This pair does not meet the criteria.
- 'I' and 'R': In the word, there is 1 letter between them (S). In the alphabet, there are 8 letters between them (J, K, L, M, N, O, P, Q). This pair does not meet the criteria.
- 'I' and 'S': In the word, there are 2 letters between them (R). In the alphabet, there are 9 letters between them (J, K, L, M, N, O, P, Q, R). This pair does not meet the criteria.
- 'R' and 'S': In the word, there is 1 letter between them (none). In the alphabet, there is 1 letter between them (T). This pair does not meet the criteria.
After checking all possible pairs, we find that only the pairs 'C' and 'I', and 'A' and 'R' meet the criteria. Therefore, the correct answer is 2 pairs.