self Maths Puzzle

A natural number's a is given in base 10. The number a can be written as 212 in base b and 128 in base b + 2. The value of a + b in base 10 is

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self Other Question

In a class , eight student s play basketball l. The remaining students, who represent 7 times the square root of the strength of the class, play football. What is the strength of the class? The integers 34031 and 32506, when divided by a three-digit integer n, leave the same remainder. What is the value of n?