Q616
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 . . . . . . . .
A.
2, 3, 5
B.
2, 3, 7
C.
2, 3, 13
AnswerD.
2, 3, 11
Answer: Option C
Solution
Answer: Option C
Solution:
abcdLet a = 1
1 2 4 8
÷ 2 ✓
÷ 3 ✓
÷ 13 ✓