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Numerical Ability
Q. A detective was assigned to generate a code using 4 digits, so that no one could break it. he knew that if the code starts with 0,5 or 7 it will be cracked. so how many numbers can be formed using 4 digits.
Read Solution (Total 3)
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- 10P4 - 3*9P3
- 11 years agoHelpfull: Yes(1) No(1)
- 7!*10p3
0,5,7 will not be allowed so remaining 7 no for the first digit 7! .......
Then for the next three digits 10p3... - 10 years agoHelpfull: Yes(1) No(1)
- 7000 codes can be developed
- 10 years agoHelpfull: Yes(0) No(0)
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