UPSC Civil Services 2017 Prelims General Studies Paper II
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Question : 49 of 80
Marks:
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Certain 3-digit numbers have the following characteristics :
1. All the three digits are different.
2. The number is divisible by 7.
3. The number on reversing the digits is also divisible by 7.
How many such 3-digit numbers are there?
1. All the three digits are different.
2. The number is divisible by 7.
3. The number on reversing the digits is also divisible by 7.
How many such 3-digit numbers are there?
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