Mathematics · Number System
A four-digit pin, 'abcd', of a lock has different non-zero digits. If the digits satisfy the conditions b = 2a, c = 2b, and d = 2c, then the pin is always divisible by which of the following sets of numbers?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12, 3, 11
- 22, 3, 13✓
- 32, 3, 7
- 42, 3, 5
Correct answer
2, 3, 13
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