Sparrow Jack jumps on a fence from one post to another. Each jump takes him one second. He makes four jumps ahead, then one jump back and again four jumps ahead and one back ect. In how many seconds will Jack jump from START to FINISH ?
IKMC Grade 1 - 2
Câu hỏi liên quan
Six little elephants, A, B, C, D, E, F, are lining up to buy tickets. F is after A and before D and he is also between B and C; B is the first in the line; and E is the last in the line. Which elephant is F ?