High School

On Tuesday, Castel bought ten posters. On Wednesday, half of all the posters that he had were destroyed. On Thursday, there were only 16 left. How many did he have on Monday?

Answer :

Final answer:

To determine how many posters Castel had on Monday, we need to work backwards from the given information. On Monday, Castel had 22 posters.

Explanation:

To determine how many posters Castel had on Monday, we need to work backwards from the given information. If there were 16 posters left on Thursday after half were destroyed on Wednesday, we can calculate how many posters Castel had before the destruction.

  1. On Thursday, there were 16 posters remaining.
  2. On Wednesday, half of all the posters were destroyed, leaving 16 posters.
  3. Therefore, before the destruction on Wednesday, Castel had 16 x 2 = 32 posters.
  4. On Tuesday, Castel bought 10 posters, so on Monday, he had 32 - 10 = 22 posters.

Therefore, Castel had 22 posters on Monday.

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