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What is the ratio of the (3)rd terms of (7,42,252,\ldots) and (5,30,180,\ldots)?

Answer and explanation

Correct answer: 7:5

The third term of the first sequence is 252, and that of the second sequence is 180. Therefore, the required ratio is 252:180. Dividing both terms by 36 gives 252:180 = 7:5. The ratio 5:7 is the reverse order, so it is not correct. Exam tip: Keep the order of the sequences the same while writing a ratio.

Related tags

SequencesRatio Of TermsGeometric SequenceNumber PatternsMathematicsSequences And ProgressionsClass 9 Mcq

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