Find the value of x: sqrt(3x + 1) = 7.
A12
B14
C16
D18
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The median of 10 observations arranged in ascending order is 24. If two middle terms are (2x + 1) and (2x + 3), find x.
A10
B11
C12
D13
A candidate needs 33% marks to pass. He gets 125 marks and fails by 40 marks. What are the maximum marks?
A400
B500
C600
D700
Simplify: (0.2 * 0.2 * 0.2 + 0.8 * 0.8 * 0.8) / (0.2 * 0.2 – 0.2 * 0.8 + 0.8 * 0.8).
A0.6
B0.8
C1.0
D1.2
In a simultaneous throw of two dice, what is the probability of getting a total of at least 10?
A1/6
B1/9
C5/36
D1/12
The perimeter of a square is equal to the circumference of a circle. If the side of the square is 22 cm, find the radius of the circle.
A7 cm
B14 cm
C21 cm
D28 cm
A boat travels 32 km upstream and 48 km downstream in 8 hours. If speed of current is 2 km/h, find boat speed in still water.
A8 km/h
B10 km/h
C12 km/h
D14 km/h
How many terms are there in the AP: 7, 13, 19, …, 205?
A32
B33
C34
D35
Find the value of (x^(a-b))^(a+b) * (x^(b-c))^(b+c) * (x^(c-a))^(c+a).
A0
B1
Cx
Dx^(a+b+c)
Two numbers are 20% and 50% more than a third number respectively. What is the ratio of the two numbers?
A2 : 5
B3 : 5
C4 : 5
D5 : 6