Neco

# NECO 2023 Mathematics Questions and Answers (Essay & Objective)

## NECO 2023 Mathematics Questions and Answers (Essay & Objective)

Wednesday, 2nd August 2023

Mathematics (Objective) – 10:00am – 11:45am

Mathematics (Essay) – 12:00pm – 2:30pm

## QUESTION PAPERS

As we always deliver you we question papers before the actual day and time, here again we unleash you with 2023  Mathematics Essay question paper for you to download it, study and answer them before the time for exams! Come back later for the solved answers.
Kindly share with friends also.     01-10: CACCDCDECE
21-30: ECAAEBECCA
41-50: EECBCBBDAE
51-60: BEECEAECCC

### NUMBER ONE

(1)

(i) P = k * Q² / Z³

where k is the constant of proportionality. To find the value of k, we can plug in the given values (P=5, Q=3, and Z=1) into the equation:

5 = k * 3² / 1³

Solving for k gives us k = 5/9. So, the relationship between P, Q, and Z is:

P = (5/9) * Q² / Z³

(ii) To find Z when P=3 and Q=5, we substitute these values into the equation we derived:

3 = (5/9) * 5² / Z³

Solving this equation for Z gives us Z = ((5/9) * 25 / 3)^(1/3). Computing this results in approximately Z = 1.88 (rounded to the nearest hundredth).

## NUMBER TWO(2)

(2a)
(I) To find the number of sides in the polygon, we can use the formula for the sum of interior angles of a regular polygon, which is (n-2) * 180°, where ‘n’ is the number of sides. Given that the sum is 1440°, we can set up an equation: (n-2) * 180° = 1440°. Solving for ‘n’, we get n = 10. So, the polygon has 10 sides.

(ii) To find the size of each exterior angle of a regular polygon, we can use the formula: exterior angle = 360° / n, where ‘n’ is the number of sides. Substituting ‘n’ with 10, we get the exterior angle as 36°.

(b)

To calculate the principal amount, we can use the formula:

Principal = Interest / (Rate * Time)

Given the interest (Interest) is N29,880.00, the rate (Rate) is 3% (0.03 as a decimal), and the time (Time) is 15 years.

Principal = 29880 / (0.03 * 15) = 29880 / 0.45 = N66,400.00

So, the principal amount that will earn N29,880.00 in 15 years at 3% per annum simple interest is N66,400.00.

## NUMBER 12            