Uncategorized Mathematics 2015 (Jamb) Posted on November 22, 2018December 3, 2018 Author goldensom Comment(0) 1. Determine the maximum value of y = 3x^{2} – x^{3} 6 2 4 0 2. If the end point of one side of square RSTU are R(-1, -1) and S(3, -1) find the area of the square. 20 square units 16 square units 36 square units 12 square units 3. The bar chart below shows the allotment of time (in minutes) per week for selected subjects in a certain school. What is the total time allocated to the six subjects per week? 960mins 460mins 200 mins 720mins 4. The length a person can jump is inversely propotional to his weight. If a 20kg person can jump 1.5m. Find the constant of proportionality. 30 60 20 15 5. The mean of 2-t, 4-t, 3-2t and t-1 is -t 2 – 3/2 t t -2 6. Simplify √147-√75 √48 1/2 2 3 1/4 7. If the angle of a sector of a circle with radius 10.5cm is 120° find the perimeter of the sector. π = ^{22}/_{7} 45 cm 40 cm 48 cm 43cm 8. The table below represents the outcome of throwing a die 100 times. What is the probability of obtaining at least a 4? Number 1 2 3 4 5 6 Frequency 18 22 20 16 10 14 1/5 2/5 1/2 3/4 9. 10. Solve the inequality ^{1}/_{3}x + ^{1}/_{4} > ^{1}/_{2}x + ^{1}/_{3} x > -1 x x > 1/2 x 11. Factorise 2y^{2} -15xy-18x^{2} (2y – 3x) (y – 6x) (2y – 3x) (y – 6x) (3y – 2x) (y -6x) (2y – 3x) (y – 6x) 12. Find the gradient of the Line joining the points P(5,6) and Q(3,3) 2 3/2 1/2 3 13. If x^{2} – 3x + 4, find ^{dy}/_{dx} at x = 5 9 7 3 5 14. Evaluate and correct to 1 decimal place 1.25 x 0.025 0.05 0.5 0.6 6.2 6.3 15. Find the median of 5,9,1,10,3,8,9,2,4,5,5,5,7,3 and 6 4 5 6 3 16. If gt – k – w = 0, make g the subject of the formula k – w t k + w t^{2} k + w t k – w t^{2} 17. Find the value of x in the figure below 20√3 cm 5√3 10√3 cm 4√3 cm 18. 32 22 18 16 19. A man donates 10% of his monthly net earnings to his church. lf it amounts to ₦4,500, what is his net monthly income? ₦40,500 ₦60,500 ₦45,000 ₦52,500 20. If y = 3 sin (-4x) ^{dy}/_{dx} is 12x cos (4x) -12 x cos(-4x) 12 sin (-4x) -12 cos (-4x) Loading … Question 1 of 20 Related