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JAMB Mathematics Past Questions & Answers - Page 90

446.

Calculate the range of 20, -6, 25, 30, 21, 28, 32, 33, 34, 5, 3, 2, and 1.

Correct answer is D

Range = 34 - (-6) = 34 + 6 = 40

447.

The pie chart above shows the distribution of subjects offered by students in SSS III level. If 80 students enrolled in the class. What is the size of the angle of the sector in economics?

24^o

39^o

32^o

36^o

View answer & explanation

Correct answer is C

x^o + 36^o + 54^o + 28^o + 90^o + 120^o = 360^o

x + 328^o = 360^o
x = 360^o - 328^o
x = 32^o

448.

If x₁₀ = 23₅. Find x

View answer & explanation

Correct answer is D

x₁₀ = 23₅
x₁₀ = 2 x 5¹ + 3 x 5⁰
= 10 + 3
= x₁₀ = 13

449.

Evaluate $\int$ (cos4x + sin3x)dx

sin4x - cos3x + k

sin4x + cos3x + k

$\frac{1}{4}$ sin4x - $\frac{1}{3}$ cos3x + k

$\frac{1}{4}$ sin4x + $\frac{1}{3}$ cos3x + k

View answer & explanation

Correct answer is C

$\int (\cos 4x + \sin 3x) \mathrm d x$

= $\frac{1}{4} \sin 4x - \frac{1}{3} \cos 3x + k$

450.

If line p = 5x + 3 is parallel to line p = wx + 5. Find the value of w.

View answer & explanation

Correct answer is D

P = 5x + 3, P = wx + 5
M₁ = 5, M₂ = w
M₁ = M₂ (parallel lines)
w = 5

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