67-67

If you mean the arithmetic subtraction: 67 − 67 = 0.

Reason: subtracting identical numbers yields zero. (67 = 60 + 7; 60 + 7 minus 60 + 7 is 0.)

If you meant something else by "67-67" (like a problem number, a range, or a different context), please share more details and I’ll help accordingly. Want some quick practice problems similar to this? Here are a few: 67−66, 68−67, 70−67.