-1 OR 5*5=25 --

Could you clarify the context? Do you mean a logical OR, or a bitwise OR between numbers?

Two common interpretations:

• Logical OR (treat nonzero as true):

  • 5*5 = 25 is true.
  • -1 is typically treated as true (nonzero).
  • true OR true evaluates to true.
  • Result: True (or 1 in many languages).

• Bitwise OR (between integers):

  • If you meant -1 OR (5*5), that’s -1 OR 25, which equals -1 (since -1 has all bits 1, OR with anything stays -1 in two’s complement).
  • If you literally mean the expression "-1 OR 5*5 = 25" with a boolean on the right, that mixes forms; usually the right side is true, so the overall OR is true.

If you tell me the exact language or exam style (logic vs. programming vs. math), I’ll tailor the answer precisely.