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If temperature t is directly proportional to heat h, and when t = 20oC, h = 50 J, find t when h = 60J
A24oC
B20oC
C34oC
D30oC
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Question 484
jamb2017
If y = x Sin x, find \(\frac{dy}{dx}\) when x = \(\frac{\pi}{2}\)
A\(\frac{- \pi}{2}\)
B-1
C1
D\(\frac{ \pi}{2}\)
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Question 485
jamb2017
Evaluate (\(\sin\)45º + \(\sin\)30º ) in surd form
A\(\frac{\sqrt{3}}{2\sqrt{2}}\)
B√3 − \(\frac{1}{2}\)
C\(\frac{1}{2}\)√2
D\(\frac{1 +\sqrt{2}}{2}\)
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Question 486
jamb2017
If two graphs Y = px2 + q and y = 2x2 − 1 intersect at x =2, find the value of p in terms of q
Aq − \(\frac{8}{7}\)
B7 − \(\frac{q}{4}\)
C8 − \(\frac{q}{2}\)
D7 + \(\frac{q}{8}\)
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Question 487
jamb2017
The curved surface area of a cylinder 5cm high is 110cm2. Find the radius of its base
π = \(\frac{22}{7}\)
A2.6cm
B3.5cm
C3.6cm
D7.0cm
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Question 488
jamb2017
If U = {x : x is an integer and 1 ≤ x ≤ 20 }
E1 = {x: x is a multiple of 3}
E2 = {x: x is a multiple of 4} and an integer is picked at random from U, find the probability that it is not in E2
A\(\frac{3}{4}\)
B\(\frac{3}{10}\)
C\(\frac{1}{4}\)
D\(\frac{1}{20}\)
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Question 489
jamb2017
What is the next number in the series 2, 1, \(\frac{1}{2}\), \(\frac{1}{4}\)...
A\(\frac{1}{3}\)
B\(\frac{2}{8}\)
C\(\frac{3}{7}\)
D\(\frac{1}{8}\)
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Question 490
jamb2017
Given T = { even numbers from 1 to 12 }
N = {common factors of 6, 8 and 12}
Find T ∩ N
A{2, 3}
B{2, 3, 4}
C{3, 4, 6}
D{2}
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Question 491
waec2016
From the diagram, which of the following is true?
Am + n + p = 180o
Bm + n = 180o
Cm = p + n
Dn = m + p
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Question 492
waec2016
An object is 6m away from the base of a mast. If the angle of depression of the object from the top of the mast is 50o, find, correct to 2 decimal places, the height of the mast.
A8.60m
B7.83m
C7.51m
D7.15m
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Question 493
waec2016
In the diagram MN is a chord of a circle KMN centre O and radius 10cm. If < MON = 140o, find, correct to the nearest cm, the length of the chord MN.
A19cm
B18cm
C17cm
D12cm
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Question 494
waec2016
Halima is n years old. Her brother's age is 5 years more than half of her age. How old is her brother?
A\(\frac{n}{2} + \frac{5}{2}\)
B\(\frac{n}{2}\) - 5
C5 - \(\frac{n}{2}\)
D\(\frac{n}{2}\) + 5
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Question 495
waec2016
The ratio of the exterior angle to the interior angle of a regular polygon is 1:11. How many sides has the polygon?
A30
B24
C18
D12
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Question 496
waec2016
Find the lower quartile of the distribution illustrated by the cumulative frequency curve
A17.5
B19.0
C27.5
D28.0
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Question 497
waec2016
Find the next three terms of the sequence; 0, 1, 1, 2, 3, 5, 8...
A13, 19, 23
B9, 11, 13
C11, 15, 19
D13, 21, 34
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Question 498
waec2016
The relation y = x2 + 2x + k passes through the point (2,0). Find the value of k
A- 8
B- 4
C4
D8
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Question 499
waec2016
A bag contains 5 red and 4 blue identical balls. Id two balls are selected at random from the bag, one after the other, with replacement, find the probability that the first is red and the second is blue
A\(\frac{2}{9}\)
B\(\frac{5}{18}\)
C\(\frac{20}{81}\)
D\(\frac{5}{9}\)
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Question 500
waec2016
In the diagram, O is the centre of the circle, < QPS = 100o, < PSQ = 60o and < QSR. Calculate < SQR
