In the word **BRISKLY**, how many pairs of the letters have the same number of letters between them in the word as in the alphabet?

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**Solution:**

1. Write down the word with letter positions:
   - B(1), R(2), I(3), S(4), K(5), L(6), Y(7)

2. Calculate the number of letters between each pair in the word:
   - For example, between B and R: positions 1 and 2, letters between = 0
   - Between B and I: positions 1 and 3, letters between = 1
   - And so on for all pairs.

3. Calculate the number of letters between the same letters in the alphabet:
   - Alphabet positions: B=2, R=18, I=9, S=19, K=11, L=12, Y=25
   - Number of letters between two letters = difference in alphabet positions - 1

4. Compare the number of letters between pairs in the word and in the alphabet.

Pairs with equal number of letters between them:
- B and I:
  - Word positions: 1 and 3 → letters between = 1
  - Alphabet positions: 2 and 9 → letters between = 9 - 2 - 1 = 6 (No)

- B and K:
  - Word positions: 1 and 5 → letters between = 3
  - Alphabet positions: 2 and 11 → letters between = 11 - 2 - 1 = 8 (No)

- R and S:
  - Word positions: 2 and 4 → letters between = 1
  - Alphabet positions: 18 and 19 → letters between = 19 - 18 - 1 = 0 (No)

- I and K:
  - Word positions: 3 and 5 → letters between = 1
  - Alphabet positions: 9 and 11 → letters between = 11 - 9 - 1 = 1 (Yes)

- K and L:
  - Word positions: 5 and 6 → letters between = 0
  - Alphabet positions: 11 and 12 → letters between = 12 - 11 - 1 = 0 (Yes)

- L and Y:
  - Word positions: 6 and 7 → letters between = 0
  - Alphabet positions: 12 and 25 → letters between = 25 - 12 - 1 = 12 (No)

- S and Y:
  - Word positions: 4 and 7 → letters between = 2
  - Alphabet positions: 19 and 25 → letters between = 25 - 19 - 1 = 5 (No)

- R and K:
  - Word positions: 2 and 5 → letters between = 2
  - Alphabet positions: 18 and 11 → letters between = 18 - 11 - 1 = 6 (No)

- I and L:
  - Word positions: 3 and 6 → letters between = 2
  - Alphabet positions: 9 and 12 → letters between = 12 - 9 - 1 = 2 (Yes)

5. The pairs that satisfy the condition are:
   - I and K
   - K and L
   - I and L

**Answer:** Three

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