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प्रश्न
A mobile number consists of ten digits. The first four digits of the number are 9, 9, 8 and 7. The last three digits are 3, 5 and 5. The remaining digits are distinct and make the mobile number, the greatest possible number. What are these digits?
उत्तर
Given, total number of digits = 10
First four digits of the mobile number = 9, 9, 8,7 and last three digits of the mobile number = 3, 5, 5
Now, to make the mobile number, the possible distinct digits are 6, 4, 2, 1 and 0.
For making the greatest mobile, we can select the digits 6, 4 and 2.
Required mobile number = 9987642355
Hence, the required digits are 6, 4 and 2.
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