Exam Maths Puzzle Numerical Ability

what is the sum of 4 digits numbers formed by using digits 5,6,7,8 it is noted that repeation is not allowed

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Exam Other Question

The number of numbers of the form 30a0b03 where a,b are digits which are divisible by 13 is

(A) 5 (B) 6 (C) 7 (D) 8
In a test P got 40% of the maximum marks and got 10 marks more than the pass mark. Q got 30% of maximum marks and failed by 10 marks. Find the pass mark.