MathematicsNumber basesJAMB
Find the digit y if 2y4₇ = 144 (base ten).
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Answer: A. 6
2 × 49 + 7y + 4 = 102 + 7y = 144, so 7y = 42 and y = 6.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.
Mathematics · Number bases
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