most wrongly answered questions#!#how to avoid silly mistakes

There are 180 multiple choice questions in a test. If a candidate gets 4 marks for every correct answer and for every unattempted or wrongly answered question one mark is deducted from the total score of correct answers. If a candidate scored 450 marks in the test, how many questions did he answer correctly?

Three are 180 multiple choice questions in a test. If a candidate gets 4 marks for every correct answer and for every unattempted or wrongly answered question one mark is deducted from the total score of correct answer correctly?

In the given sentence, identify the segment which contains the grammatical error. Each of these players have been warned not to repeat the silly mistakes. (a) Each of these players (b) the silly mistakes (c) warned not to repeat (d) have been

In a test, for each correct answer 1 mark is awarded and each wrong answer half a mark is deducted. The test has 70 questions. A candidate attempted all the questions in the test and scored 40 marks. How many question did he attempt wrongly ?

Consider the following reaction to answer the next three question: The most likely structure of A is