Question

In a test(+5) marks are given for every correct answer and (-2) marks
we given for every incorrect answer. (1) Radhika answered all the question
and scored 10 marks though she got 10 correct answers. (ii) Jay also answers all the questions and scored (-12) marks though he got 4 correct answers. how many incorrect answers had they attempted?​

Answer 1

❁Topic :

$\to{Integers}$

❁Solution:

Number of each mark for correct answers = (+5)

Number of each mark for incorrect answers = (-2)

Radika scores = 10 marks

marks for correct answers = 10 × 5 = 50

Marks for incorrect answers = 10-50= -40

Number of incorrect answers = -40÷-2= -20

Jay scores = (-12)

marks for correct answers = 4×5=20

marks for incorrect answers = -12-20= -32

Number of incorect answers = -32÷-2= 16.

❁Additional information:

• Integers is the collection of positive and negative numbers
• zero is neighter positive nor negative.
• Every positive integer is greater than Every negative integer and every negative integer is smaller than every positive integer
• 1 ÷0=0 , but 0÷1 = cannot answer

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