olymmath

HMMT November 2017 E6

  • General
  • Answer

A positive integer nn is magical if

⌊⌈n⌉⌋=⌈⌊n⌋⌉,\lfloor\sqrt{\lceil\sqrt{n}\rceil}\rfloor=\lceil\sqrt{\lfloor\sqrt{n}\rfloor}\rceil,

where ⌊⋅⌋\lfloor\cdot\rfloor and Γ⋅⌉\Gamma \cdot\rceil represent the floor and ceiling function respectively. Find the number of magical integers between 1 and 10,000, inclusive.

Dataset text NuminaMath olympiads. Quoted with source.

Show the answer

1330

Solutions

No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.

Add a solution

Similar problems

These problems have the most words in common with this statement.

Locator hmnt/2017/e6 · Tag B32SR6HMPF · Edit this page on GitHub · Keys: j next, k previous