NUMBER AND NUMERATION - Jamb Mathematics Past Questions and Answers

Question 571:

• JAMB 2015

If an investor invest N450,000 in a certain organization in order to yield X as a return of N25,000. Find the return on an investment of N700,000 by Y in the same organization.

A. N14,950.50K
B. N25,150.30K
C. N15,000.00K
D. N38,888.90K

Question 572:

• JAMB 2015

Evaluate log₇17

A. 1.35
B. 1.353
C. 1.455
D. 0.455

Question 573:

• JAMB 2015

10011₂ + *****₂ + 11100₂ + 101₂ = 1001111₂

A. 1111₂
B. 11011₂
C. 10111₂
D. 11001₂

Question 574:

• JAMB 2015

Evaluate log5(\( y^2x^5 ÷ 125b½) \)

A. 2 log₅y + 5log₅ y² − 3
B. Log₅ y² + 5log₅ x + 3
C. 25log_y 5 + 3
D. 2log₅y + 5log₅x − ½ log₅b −3

Question 575:

• JAMB 2015

Simplify \( \frac{1}{(x + 1)} + \frac{1}{(x − 1)} \)

A. 2x/(x + 1)(x−3)
B. 2/(x + 1)(x−1)
C. 2x/(x + 1)2
D. 2x(x+1)2