Encircle the odd one of the following
a. (-1) × (-1)
b. (-1) × (-1) × (-1)
c. (-1) × (-1) × (-1) × (-1)
d. (-1) × (-1) × (-1) × (-1) × (-1) × (-1)
Solution:
To encircle the odd one from the given option the easiest and fastest method is to apply integer rules on individual options and examine the pattern that is being followed.
a) (-1) × (-1) = 1
b) (-1) × (-1) × (-1) = -1
c) (-1) × (-1) × (-1) × (-1) = 1
d) (-1) × (-1) × (-1) × (-1) × (-1) × (-1) = 1
Therefore on simplifying the individual option, we examined that, the value of the option (b) (-1) × (-1) × (-1) is -1. Hence it is the odd one out.
✦ Try This: Identify the odd one out from the given option: (100) ÷ 20, (81) ÷ 3, (25) ÷ 5, (73) ÷ 5 .
To identify the odd one out from the above-listed option apply integer rules on individual options and examine the pattern that is being followed.
☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 1
NCERT Exemplar Class 7 Maths Chapter 1 Exercise Problem 30
Encircle the odd one of the following: (-1) × (-1), (-1) × (-1) × (-1), (-1) × (-1) × (-1) × (-1), (-1) × (-1) × (-1) × (-1) × (-1) × (-1)
Summary:
According to the integer rules, on simplifying the individual option using multiplication property, we examined that, the value of option (b) (-1) × (-1) × (-1) = -1 stands out as a negative value. Hence it is the odd one out.
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