MathematicsProgressionsJAMB
How many terms are there in the arithmetic progression 7, 11, 15, …, 83?
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Answer: C. 20
83 = 7 + (n − 1)4 gives n − 1 = 19, so n = 20.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.