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A four-digit pin, say 'abcd', of a lock has different non-zero digits. The digits satisfy b = 2a, c = 2b, d = 2c. The pin is divisible by . . . . . . . .
Answer & Solution
Correct Answer:
Option
C
abcd
Let a = 1
1 2 4 8
÷ 2 ✓
÷ 3 ✓
÷ 13 ✓
Let a = 1
1 2 4 8
÷ 2 ✓
÷ 3 ✓
÷ 13 ✓
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