Mathematics looks at measurement, relationships, and properties of numbers and groups using numbers and symbols. Important topics in math include arithmetic, algebra, geometry, and calculus.
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Question 441: The weights of 30 new-born babies are given as follows: 6, 9, 5, 7, 6, 7, 5, 8, 9, 5, 7, 5, 8, 7, 8, 7, 5, 6, 5, 7, 6, 9, 9, 7, 8, 8, 7, 8, 9, 8. The mode is
Options:
A) 6
B) 5
C) 8
D) 7
E) 10
Show Answer
The correct answer is D .
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Question 442:
A train moves from P to Q at an average speed of 90km/h and immediately returns from Q to P through the same route at an average speed of 45km/h. Find the average speed for the entire journey
Options:
A) 55.00km/h
B) 60.00km/h
C) 67.50km/h
D) 75.00km/h
Show Answer
The correct answer is B .
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Question 443: The solution of the quadratic equation bx2 + cx + a = 0 is given by
Options:
A) x = b
B) x = c
C) x = -c
D) x = -b
Show Answer
The correct answer is C .
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Question 444: Find the acute angle between the straight lines y = x and y = √3x
Options:
A) 15
B) 30
C) 45
D) 60
Show Answer
The correct answer is A .
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Question 445:
If O is the centre of the circle in the figure, find the value of x
Options:
A) 50
B) 260
C) 100
D) 65
E) 130
Show Answer
The correct answer is C .
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Question 446:
Evaluate
Options:
A)
B)
C)
D)
Show Answer
The correct answer is C .
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Question 447: If a rod 10cm in length was measured as 10.5cm, calculate the percentage error
Options:
A) 5%
B) 10%
C) 8%
D) 7%
Show Answer
The correct answer is A .
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Question 448: An isosceles triangle of sides 13cm, 13cm, 10cm is inscribed in a circle. What is the radius of the circle?
Options:
A) 7cm
B) 12cm
C) 8cm
D) 7cm
E) 69cm
Show Answer
The correct answer is A .
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Question 449:
Find p in terms of q if log3 p + 3 log3 q = 3
Options:
A) ()3
B) ()
C) ()3
D) ()
Show Answer
The correct answer is A .
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Question 450: The length L of a simple pendulum varies directly as the square of its period T. If a pendulum with period 4 sec. is 64 cm long, find the length of pendulum whose period is 9 sec
Options:
A) 96 cm
B) 324 cm
C) 36 cm
D) 144 cm
Show Answer
The correct answer is B .