Latest CAT Aptitude Question SOLUTION: the number 1,2,3......40 are written on blackboard. the following operation is then repeated 39 times .in each repetition any two number say and b currently on the blackboard are e

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(#M40151533) CAT Numerical Ability question number system Keep an EYE

the number 1,2,3......40 are written on blackboard. the following operation is then repeated 39 times .in each repetition any two number say and b currently on the blackboard are erased and a new number a+b-1 is written what will be the number left on the blackboard at the end.
options
a) 820 b)821 c)781 d)819 e)780

Asked In CAT padam singh ahlawat (9 years ago)

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