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Kalpit Pirzada Nagar
Kalpit Pirzada Nagar
Asked: 3 years ago2022-11-04T06:52:36+05:30 2022-11-04T06:52:36+05:30In: General Awareness

Tintin unlocks the chest, and plugs the key into the main door. A dial emerges on the door. Beginning with the dial set at zero, the dial must be turned counter-clockwise to the first combination number, (then clockwise back to zero), and clockwise to the second combina- tion number, (then counter-clockwise back to zero), and counter-clockwise again to the third and final number, where upon the door shall immediately spring open. There are 40 numbers on the dial, including the zero. Without knowing the combination numbers, what is the maximum number of trials required to open the safe (one trial equals one attempt to dial a full three-number combination)?
A. 64000
B. 1600
C. 63999
D. 1599

Tintin unlocks the chest, and plugs the key into the main door. A dial emerges on the door. Beginning with the dial set at zero, the dial must be turned counter-clockwise to the first combination number, (then clockwise back to zero), and clockwise to the second combina- tion number, (then counter-clockwise back to zero), and counter-clockwise again to the third and final number, where upon the door shall immediately spring open. There are 40 numbers on the dial, including the zero. Without knowing the combination numbers, what is the maximum number of trials required to open the safe (one trial equals one attempt to dial a full three-number combination)?
A. 64000
B. 1600
C. 63999
D. 1599
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  1. e29d3
    2022-11-04T17:41:06+05:30Added an answer about 3 years ago

    We get `40*40*1 = 1600` (Since the last round, it opens immediately) ­ 1 (Case of 000)  = 1599

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