MBA Exam

If ‘c’ is a positive integer, how many three-digit numbers ‘abc’ are there such that both ‘abc’ and ‘cba’ are divisible by 4?plz explain your approach

1) 40
2) 30
3) 34
4) none

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MBA Other Question
For how many real numbers ‘a’ does the quadratic equation have only integer roots?Is there any shorter method to solve it quickly

1) 6
2) 16
3) 10
4) Infinite
 Three points are selected on a circle with centre O (Three points x, y, z).

1) 18
2) 48
3) 36
4) 36√2
5) 36 ⁄ √2