Important Arithmetical operations Questions with Answer :
1. Adam who is 20 years old is 4 times as old as Mary. What will be Mary’s age when Adam is twice as old as her ?
(1) 35 years
(2) 15 years
(3) 30 years
(4) 17 years
2. A was twice as old as B, two years ago. If the difference in their ages be 2 years, find A’s age.
(1) 6
(2) 8
(3) 10
(4) 4
3. The average age of the present ages of Amit and Anil is 32 years. If Amit is 6 years older than Anil, what is Anil’s present age?
(1) 38 years
(2) 26 years
(3) 19 years
(4) 29 years
4. A man was 31 years of age when he had his first son. His wife was 26 years of age when his son attained the age of 7 years. The difference in age between the man and his wife is :
(1) 7 years
(2) 9 years
(3) 5 years
(4) 12 years
5. 12 year old Sami is three times as old as his brother Vinay. How old will Sami be when he is twice as old as Vinay ?
(1) 18 years
(2) 14 years
(3) 20 years
(4) 16 years
6. A man was 32 years of age when he had his first son. His wife was 35 years of age when his son attained the age of 7 years. The difference between the age of the father and the mother is ______.
(1) 7 years
(2) 3 years
(3) 5 years
(4) 4 years
7. If 4 cats can kill 4 rats in 4 minutes, how many minutes will it take 8 cats to kill 8 rats ?
(1) 8
(2) 4
(3) 2
(4) 16
8. It took 20 days for all the leaves of a tree to fall. If the number of the leaves that fell each day was twice that of the previous day, on which day would the tree be half bare ?
(1) 10th day
(2) 11th day
(3) 40th day
(4) 19th day
9. There are tweleve dozens of apples in a basket. Two dozens are added later. Ten apples got spoilt and are removed. The remaining are transferred equally into two baskets. How many are there in each?
(1) 168
(2) 158
(3) 79
(4) 89
10. A shepherd had 34 sheep. All but 18 die. How many sheep were left ?
(1) 16
(2) 14
(3) 18
(4) 34
11. The last three digits of the binary equivalent of the number 85432578 is
(1) 001
(2) 100
(3) 110
(4) 010
12. What is the least number to be subtracted from 2486 to make it a perfect square ?
(1) 85
(2) 90
(3) 95
(4) 80
13. In a question paper, there are 12 questions in all out of which only six are to be answered. Six questions have an alternative each. Each question has four parts. How many questions including parts are there in the question paper ?
(1) 48
(2) 72
(3) 96
(4) 24
14. John and Khan start together from a particular point in the opposite direction on motorcycle. The speed of John is 25 km/hr and Khan is 35 km/hr. What will be the distance between them after 15 minutes?
(1) 15 km
(2) 20 km
(3) 5 km
(4) 10 km
15. Two trains A and B running at 60 kmph and 40 kmph respectively in opposite directions from stations X and Y 200 km apart will cross or collide at a moment exactly after
(1) 1 hour and 30 minutes
(2) 3 hours and 20 minutes
(3) 2 hours
(4) 2 hours and 30 minutes
16. If a train 150 m long crosses a pole in 12 seconds, then what is the speed of the train in km per hr ?
(1) 45
(2) 60
(3) 50
(4) 75
17. If the sum of one half and one fifth of a number exceeds one third of the number by 7 1/3 , the number is
(1) 15
(2) 18
(3) 20
(4) 30
18. All of us, plus half of us and quarter of us and you alone taken together equal 71. How many are we really?
(1) 70
(2) 60
(3) 50
(4) 40
19. The ratio of the number of girls to the number of boys in a town is 90%. If the total number of boys and girls in the town is 190, how many girls are in the town?
(1) 100
(2) 110
(3) 90
(4) 80
20. Two persons A and B get the same salary. Their basic pay are different. The allowances are 65% and 80% of the basic pay respectively. What is the ratio of the basic pay ?
(1) 17:15
(2) 7:5
(3) 11:10
(4) 12:11
21. In a given perimeter, which has the maximum area?
(1) Square
(2) Rectangle
(3) Circle
(4) Triangle
22. 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
23. The ratio of two numbers is 3 : 5 and their LCM is 300. Then one of the numbers will be
(1) 30
(2) 50
(3) 60
(4) 75
24. If the cost of 16 kg of wheat is Rs. 384, what is the cost of 90 kg of wheat ?
(1) Rs. 2,016
(2) Rs. 2,024
(3) Rs. 2,610
(4) Rs. 2,160
25. During the last four years a doctor has shown annual growth of his income as given below :
What would be his income growth in 1999?
(1) 40
(2) 30
(3) 35
(4) 45
