If 20 teachers out of a faculty of 80 are transferred, what percentage of the original faculty remains ?A. 4
B. 16
C. 60
D. 75
B. 16
C. 60
D. 75
Mathematics Mcqs
The average of two numbers is XY.If one number is equal to X ,the other number is equal to_________?
The average of two numbers is XY.If one number is equal to X ,the other number is equal to_________?A. X
B. 2Y
C. XY-X
D. 2 XY -2 X
B. 2Y
C. XY-X
D. 2 XY -2 X
If 35% of a number is 12 less than 50% of that number, then the number is_________?
If 35% of a number is 12 less than 50% of that number, then the number is_________?
A. 40
B. 50
C. 60
D. 80
Explanation:
Let the number be x. Then,
50% of x – 35% of x = 12
50/100 x – 35/100 x = 12
x = (12 * 100)/15 = 80.
The difference between a number and its two-fifth is 510. What is 10% of that number?
The difference between a number and its two-fifth is 510. What is 10% of that number?
A. 12.75
B. 85
C. 204
D. None of these
Explanation:
Let the number be x. Then,
x – 2/5 x = 510
x = (510 * 5)/3 = 850
10% of 850 = 85.
Two-fifth of one-third of three-seventh of a number is 15. What is 40% of that number?
Two-fifth of one-third of three-seventh of a number is 15. What is 40% of that number?
A. 72
B. 84
C. 136
D. 140
E. None of these
Explanation:
Let the number be x. Then,
2/5 of 1/3 of 3/7 of
x = 15 => x = (15 * 5/3 * 3 * 5/2) = 525/2
40% of 525/2 = (40/100 * 525/2) = 105
If 20% of a number, then 120% of that number will be_________?
If 20% of a number, then 120% of that number will be_________?
A. 20
B. 120
C. 360
D. 720
Explanation:
Let the number x. Then,
20% of x = 120
x = (120 * 100)/20 = 600
120% of x = (120/100 * 600) = 720.
45% of 750 – 25% of 480 =__________?
45% of 750 – 25% of 480 =__________?
A. 216
B. 217.50
C. 236.50
D. 245
Explanation:
Given expression = (45/100 * 750) – (25/100 * 480) = (337.50 – 120) = 217.50
3.5 can be expressed in terms of percentage as?
3.5 can be expressed in terms of percentage as?
A. 0.35%
B. 3.5%
C. 35%
D. 350%
Explanation:
3.5 = 35/10 = (35/10 * 100) = 350%
The ratio of the prices of three articles X, Y and Z is 8 : 5 : 3. If the prices of X , Y and Z are increased by 25%, 20% and 33 1/3% respectively, then what would be the ratio of the new prices of X, Y and Z?
The ratio of the prices of three articles X, Y and Z is 8 : 5 : 3. If the prices of X , Y and Z are increased by 25%, 20% and 33 1/3% respectively, then what would be the ratio of the new prices of X, Y and Z?
A. 5 : 3 : 1
B. 5 : 3 : 2
C. 10 : 7 : 4
D. 10 : 8 : 5
E. None of these
Explanation:
Let the prices of X, Y and Z be 8k, 5k and 3k respectively.
After increase
Price of X = 8k * 125/100 = 10k
Price of Y = 5k * 120/100 = 6k
Price of Z = 3k * (133 1/3)/100 = 4k
Required ratio = 10k : 6k : 4k = 5 : 3 : 2.
Two tests had the same maximum mark. The pass percentages in the first and the second test were 40% and 45% respectively. A candidate scored 216 marks in the second test and failed by 36 marks in that test. Find the pass mark in the first test?
Two tests had the same maximum mark. The pass percentages in the first and the second test were 40% and 45% respectively. A candidate scored 216 marks in the second test and failed by 36 marks in that test. Find the pass mark in the first test?
A. 136
B. 128
C. 164
D. 214
E. None of these
Explanation:
Let the maximum mark in each test be M.
The candidate failed by 36 marks in the second test.
pass mark in the second test = 216 + 36 = 252
45/100 M = 252
Pass mark in the first test = 40/100 M = 40/45 * 252 = 224.