JAMB Mathematics 2008 Objective — Question 2
Question 2 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2008 Objective paper, with the correct answer and a full explanation.
Advertisement
If 125(base x) = 20 (base 10), find x
- A. 2
- B. 3Correct
- C. 4
- D. 5
Explanation
125(base x) = 1x^2+2x+5 = 20. x^2+2x-15=0. (x+5)(x-3)=0. x=3 (positive base).
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.