self Maths Puzzle

248:3 :: 320: ?

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self Other Question

A Prof prepared an exam of 50 questions.For correct 1 mark,for wrong -1/3,for unanswered +1/6.A and B gave the test such that A’s all attempted questions are correct and B got atleast one question wrong.
Q1.the highest possible same score of A and B?
Q2.with highest possible same score ,how many questions does b got wrong?
A b o y want s t o make c ub o ids o f dime nsio n 5 m, 6m & 7 m fr o m small c ub e s o f . 0 3 m^3 . Lat e r he r e alize d t hat he
c an make so me c ub o ids b y making it ho llo w. The n it t ake s so me c ub e s le ss. What is t he number of cube to be removes?