Question : Directions: Select the option related to the third number in the same way as the second number is related to the first number and the sixth number is related to the fifth number.
17 : –153 :: –13 : ? :: –21 : 189
Option 1: –104
Option 2: 117
Option 3: 129
Option 4: –127
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Correct Answer: 117
Solution :
Given:
17 : –153 :: –13 : ? :: –21 : 189
Multiply the first number by –9, to obtain the second number in each number pair –
Like,
17 : –153→17 × (–9) = –153
And, –21 : 189→–21 × (–9) = 189
Similarly, follow the same pattern for –13 : ?→
–13 × (–9) = 117
So, 117 is the required missing number. Hence, the second option is correct.
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