As shown in the figure below, the upward triangle was made with the ten-yen coins.
In order for this triangle is carried out downward with the same form, how many coins should be moved with least number of coins ?
In order for this triangle is carried out downward with the same form, how many coins should be moved with least number of coins ?
Answer
Three coins
Solution
⑦ is moved to the left of ②. ⑩ is moved to the right of ③. ① is moved to below both of ⑧ and ⑨.
