Important Arithmetical Operations Questions with Answer :
1. Govind is 48 years old. He is twice as old as his son Prem is now. How old was Prem seven years before ?
(1) 16
(2) 17
(3) 13
(4) 18
2. X is four years older than Y who is twice as old as Z. If the total ages of X, Y and Z be 34, how old is X?
(1) 8
(2) 10
(3) 12
(4) 16
3. Mrs. Lata was 3 times as old as her son 8 years ago. Their total age is 64 years now. How old (in years) is Mrs. Lata now?
(1) 48
(2) 12
(3) 36
(4) 44
4. Joan’s age is 42 years and Kelvin’s age is 26 years. How many years ago was Kelvin’s age half of Joan’s age ?
(1) 6 years
(2) 4 years
(3) 10 years
(4) 8 years
5. Mani is double the age of Prabhu, Ramona is half the age of Prabhu. If Mani is sixty, find out the age of Ramona.
(1) 20
(2) 15
(3) 10
(4) 24
6. Hema was twice as old as Geeta 10 years ago. How old is Geeta today, if Hema will be 40 years old 10 years henceforth ?
(1) 25 years
(2) 20 years
(3) 15 years
(4) 35 years
7. 50 men can dig 40 holes in 30 days. How long will 25 men take to dig 20 holes?
(1) 15 days
(2) 22½ days
(3) 30 days
(4) 45 days
8. A man is engaged for planting trees for 10 hours. He plants 10 trees in an hour. He takes rest for 30 minutes after every hour. How many trees does he plant in 10 hours?
(1) 100
(2) 50
(3) 70
(4) 45
9. If 876 = 12, 864 = 81, 895 = 22, what is 824 = ?
(1) 14
(2) 64
(3) 48
(4) 41
10. If 2 = 0, 3 = 3, 4 = 6, 5 = 9 then 7 = ?
(1) 18
(2) 12
(3) 15
(4) 16
11. If 246 = 8, 624 = 0 and 327 = 6 then 423 = ?
(1) 10
(2) 9
(3) 8
(4) 1
12. On one side of a street are even numbers and on the other side are odd numbers. No. 1 is exactly in front of No. 2. My house is No. 9. From my house, a man comes up from No. 2 and knocks at the door, five doors beyond the house infront of me. What is the No. of that house ?
(1) 18
(2) 20
(3) 22
(4) 26
13. If 5 and 8, 3 and 9, 2 and 6 and 1 and 4 exchange their values, what is the value of 3 6 5 4 1 9 ?
(1) 9 2 8 1 4 3
(2) 9 2 8 4 1 3
(3) 9 2 8 4 3 1
(4) 9 8 2 1 4 3
14. If 10 boys walk 10 km in 10 days, then how many days it will take for 3 boys to walk 10 km?
(1) 1
(2) 3
(3) 6
(4) 10
15. A train starts from station A and reaches B 15 minutes late when it moves with 40 km/hr and 24 minutes late when it goes 30 km/hr. The distance between the two stations is
(1) 24 km
(2) 16 km
(3) 18 km
(4) 21 km
16. The distance between two cities is 30 km. A man goes at a speed of 30 km. per hour and returns at 20 km. per hour. What is his average speed?
(1) 25 km./hr.
(2) 24 km./hr.
(3) 10 km./hr.
(4) 26 km./hr.
17. 1/2 of a number is greater than 1/3 of that number by 17. What is the number?
(1) 54
(2) 84
(3) 102
(4) 112
18. If the amount Rama has is more than what Ravi has by 1/3rd and Ravi has 4 rupees less than Rama, what is the amount in rupees that Rama has?
(1) 16
(2) 12
(3) 8
(4) 64
19. A merchant sells an article by increasing its cost by 10% first, and then reducing it by 10%. What is the net effect to the merchant in that business ?
(1) No loss-no profit
(2) 1 % loss
(3) 1 % profit
(4) 2% profit
20. Specify the choice which gives the number that would replace the question mark. 75% of 220 = ? × 15
(1) 165
(2) 110
(3) 11
(4) 1.1
21. The length of rectangle is 1 cm. more than its width. Its perimeter is 14 cm. The area of the rectangle is
(1) 16 cm2
(2) 15 cm2
(3) 12 cm2
(4) 10 cm2
22. A man takes 6 km. distance to go around the rectangular area. If the area of the rectangle is 2 sq. km., find the difference between length and breadth.
(1) 2 km.
(2) 0.5 km.
(3) 1 km.
(4) 0.75 km.
23. If the ratio of the areas of two squares is 16 : 1, then the ratio of their perimeters is
(1) 4 : 1
(2) 16 : 1
(3) 1 : 3
(4) 3 : 4
24. After giving a discount of 15% an article is sold at Rs. 2550, what is its marked price ?
(1) 3200
(2) 3000
(3) 2900
(4) 3700
25. In a row, 25 trees are planted at equal distance from each other. The distance between 1st and 25th tree is 30 m. What is the distance between 3rd and 15th tree ?
(1) 8m
(2) 15m
(3) 16m
(4) 18m
