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Maths Puzzle
Logical Reasoning
Cryptography
A two digit number added to 18, we get another two digit number with reversed digits. Then how many pairs of two digit numbers are possible?
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self Other Question
In a class, 67% play cricket, and 82% play chess.
Question 1: What is the maximum number of students who can play cricket as well as chess.
Question 2: What is the minimum number of students who can play cricket as well as chess, given that each students play atleast one game.
If the difference between a three digit number ABC and the number formed by reversing its digits is divisible by 7 then how many number of possible values of ABC exist?