Finger-counting (back-and-forth on one hand): Determine the landing finger at a large count. Counting pattern on the left hand: thumb = 1, index = 2, middle = 3, ring = 4, little = 5; then reverse direction (ring = 6, middle = 7, index = 8), and continue similarly. The girl counts up to 1994 using this back-and-forth sequence. On which finger does she stop? Choose the correct finger.

Given data

• Forward: Thumb(1), Index(2), Middle(3), Ring(4), Little(5)
• Reverse: Ring(6), Middle(7), Index(8), then Thumb(9) and repeat.

Concept/Approach
The sequence of landing fingers repeats every 8 counts: [Thumb, Index, Middle, Ring, Little, Ring, Middle, Index]. Reduce 1994 modulo 8.

Step-by-step calculation
1994 ÷ 8 = 249 remainder 2.Remainder 2 corresponds to the 2nd item in the 8-step cycle → Index finger.

Verification
Counts 1–9 land on: T, I, M, R, L, R, M, I, T → cycle matches analysis.

Final Answer
Index finger