Directions: Each of the questions given below is followed by series of options among which you have to choose the best one. You can also review your choices by clicking into answer section.
1. Out of the first 75 natural numbers, what percentages of them have 7 either in the units place or in the tens place?
A. 18.67%
B. 17.33%
C. 16%
D. 17%
Answer
Explanation:
No explanation
2. The population of a town has increased from 133575 to 138918. The percent increase in population is.
A.2.5
B.3.5
C.3
D.4
Answer
Explanation:
Increase on 133575 = 138918 – 133575 = 5343
Increase on 100 = 5343/133575 *10 = 4
3. If x=3y, what % of x is y?
A. 3%
B. 10%
C. 30%
D. 33.33%
Answer
Explanation:
y = x/3 = (1/3)*x = (100/3)% of x = 33.33% of x
4. What percent of a day is 6 hours?
A. 6.25%
B. 20%
C. 25%
D. 12.5%
Answer
Explanation:
Total hours in a day = 24
Required percentage = 624×100=25%
5. Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:
A.39, 30
B.41, 32
C.42, 33
D.43, 34
Answer
Explanation:
Let their marks be (x + 9) and x.
Then, x + 9 = (56/100)(x + 9 + x)
25(x + 9) = 14(2x + 9)
3x = 99
x = 33
So, their marks are 42 and 33.
6. If the length and breadth of a rectangle is increased by 15% and 20%, by how much will the area of the rectangle increase?
A. 38%
B. 35%
C. 32%
D. 30%
Answer
Explanation:
Area of the new rectangle = 1.15l*1.2b = 1.38lb % increase in area = 38%
7. The price of a car is Rs.3,25,000. It was insured to 85% of its price. The car was damaged completely in an accident and the insurance company paid 90% of the insurance. What was the difference between the price of the car and the amount received?
A. Rs.76,375
B. Rs.34,000
C. Rs.82,150
D. Rs.70,000
Answer
Explanation:
Price of the car = Rs.3,25,000
Car insured to 85% of its price
=Insured price=325000×85100
Insurance company paid 90% of the insurance
Amount paid by Insurance company =Insured price×90100=325000×85100×90100=325×85×9=Rs.248625
Difference between the price of the car and the amount received
= Rs.325000 – Rs.248625 = Rs.76375
8. If the length of a rectangle is halved and the breadth is tripled, by how much % does the area of the rectangle increase?
A. 20%
B. 30%
C. 50%
D. 100%
Answer
Explanation:
New area = l/2 * 3b = 3lb/2 % change= [((3lb/2)- lB./lb] * 100= 50%
9. Subtracting 40% of a number from the number, we get the result as30. The number is:
A.
B.52
C.50
D.70
Answer
Explanation:
x – 40% of x = 30
⇒ x – 40/100x = 40
so x = 50
10. Reena scores 80 marks in her first internal math’s paper. By how much should she improve her mark in the second internal in order to get an average of 90 in math?
A. 100%
B. 50%
C. 25%
D. 20%
Answer
Explanation:
If her average should be 90, she should score 100 in the second internal. % improvement= [(100-80)/80] * 100 = 25%
11. Two employees X and Y are paid a total of Rs.550 per week by their employer. If X is paid 120 percent of the sum paid to Y, how much is Y paid per week?
A. Rs. 150
B. Rs. 300
C. Rs. 250
D. Rs. 200
Answer
Explanation:
Let the amount paid to X per week = x
and the amount paid to Y per week = y
Then x + y = 550
But x = 120% of y =120y100=12y10
∴12y10+y=550
y[1210+1]=550
22y10=550
22y=5500
y=5500/22=500/2=Rs.250
12. What % of 10 is 10% of 1?
A. 10
B. 0.01
C. 0.1
D. 1
Answer
Explanation:
:(x/100)*10 = (10/100)*1 x = 1 x% of y = y% of x
13. The population of a town was 1,00,000 three years ago. If it increased by 2%, 3% and 5% respectively in the last three years, then the present population of the town is
A. 1,10,562
B. 1,10,000
C. 1,10,313
D. 1,11,237
Answer
Explanation:
The present population = (102/100)*(103/100)*(105/100)*100000 = 1,10,313
14. A pipe X is 30 meters and 45% longer than another pipe Y. find the length of the pipe Y.
A. 20.12
B. 20.68
C. 20
D. 20.5
Answer
Explanation:
Length of pipe X = 30 meter
Given that pipe X is 45% longer than Y
Let the length of pipe Y = y
Then, Length of pipe X = y × (100+45)100⇒30
(y × 145)100=30
y= (30×100)/145=(6×100)/29=600/29
=20.68
15. What percent is 3% of 5%?
A.60%
B.15%
C.50%
D.30%
Answer
Explanation:
Required no is (3% / 5%)*100 = 60%
