练习题 · 英文原题 · SEL-TS-TST-21
What comes next in this pattern?
Z1, Y3, W6, T10, P15, ?
查看答案与解析(英文)
答案: A
Answer: A (K21)
The letters and the numbers each follow their own rule.
- Letters: Z to Y is back 1, Y to W is back 2, W to T is back 3, T to P is back 4. Next is back 5: from P, count O, N, M, L, K. The letter is K.
- Numbers: 1, 3, 6, 10, 15 go up by 2, 3, 4, 5. Next is up 6: 15 + 6 = 21.
- So the next term is K21.
Why the other options are wrong
- B (K20): This adds 5 to the number again instead of 6.
- C (J22): This goes one step too far on both parts: back 6 letters and up 7.
- D (L21): This moves the letter back 4 places again instead of 5.
