Elitmus Exam Numerical Ability Arithmetic

Newton designed a test paper. one correct then +1, wrong -1, left unattempted -1/3. if seeta give this test there is surety that she will wrong atleast 1 question. If Newton gives test he will all the questions correctly. What is the max. common score they can achieve.

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Elitmus Other Question

a circle with radius 2 , has a square inscribed in it. At the edges of square,circles are drawn taking sides as a diameter. Find the area of outer circles how many numbers are possible between 100 to 999 where middle digit is smaller than other two. e.g. 102?