Mathematics · Number System
Let p, q, r and s be positive natural numbers having exactly three factors including 1 and the number itself. If q > p and both are two-digit numbers, and r > s and both are one-digit numbers, then the value of the expression (p - q - 1) / (r - s) is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1s + 1
- 21 - s
- 3s - 1
- 4-s - 1✓
Correct answer
-s - 1
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