1. REVISION

2. The ratio of two numbers is 15:11 and their HCF is 13
The ratio of two numbers is 15:11 and their HCF is 13. What is the sum of two numbers?
428
468
338
318
Num1=15*13=195
Num2=11*13=143
Sum=
Ans: 338

3. Find the unit digit in the product (243 × 397 × 2497 × 3913)?
Ans: 1

4. What are the last two digits of 33002?
Ans: 09

5. Find the smallest positive number which is exactly divisible by 1/3, 1/2, 3/7, 4/11.
Ans:12
LCM of fraction= LCM of Nr/HCF of Dr.

6. What are the last two digits of 43002?
And: 16

7. Which one of the following can't be the square of natural number?
28561
75625
30976
143642
Ans:

8. On dividing a number by 63, we get 25 as remainder
On dividing a number by 63, we get 25 as remainder. On dividing the same number by 7, what will be the remainder? 1 2 3 4
25 mod 7=r(4)
Ans: 4

9. On dividing a number by 72, we get 55 as remainder
On dividing a number by 72, we get 55 as remainder. On dividing the same number by 8, what will be the remainder? 1 3 5 7
Ans: 7

10. What would be the remainder when 500! is divided by 501?1 2 4
Ans: 0

11. Find the least number which when divided by 6,7,8,9 and 12 leaves the same remainder 1 in each case
505
506
504
501
Ans: 505

12. The largest possible length of the tape which can measure 525cm,1050cm and 1155cm length of clothes in minimum number of attempts without measuring the length of the cloth in a fraction of tape’s length 25
105 95 75
Ans: 105

13. A milkman has three qualities of milk, 403 litres of first quality, 465 litres of second quality and 496 litres of third quality. Find the least possible no. Of bottles of equal size in which milk of different qualities can be filled without mixing? 34 31 26 44
Ans: 44

14. Find the number of factors of 19600?32 36 40 45
Ans: 45

15. What is the value of ….
1223/9900
1227/9000
27/200
27/220
27/220

16. A number when divided by a divisor leaves a remainder of 24
A number when divided by a divisor leaves a remainder of 24. When twice the original number is divided by the same divisor, the remainder is 11. What is the value of the divisor? 13 59 35 37

17. Find the remainder when (2222^5555+5555^2222)/7.1 2 4

18. What is the remainder when 3^37 is divided by 10?-3 -2 2 3

19. What is the last digit of 4^96?2 5 6

20. What is the remainder when12345678^75 is divided by 9?-1 9

21. Average weight of 10 students is 34 Kg, another group of 15 students of average weight is 49 Kg join them, what is the average weight of all student? 25 40 43 59 43

22. The average weight of 14 men is increased by 2 kg when one of the men, whose weight is 75 kg is replaced by a new man. The weight of the new man is 37 99
101
103
103

23. A library has an average of 520 visitors on Sundays and 240 on other days. What is the average number of visitors per day in a month of 28 days beginning with a Sunday?
200
280
480
560
280

24. The average salary of the entire staff in a office = 160; average salary of officers = 320; average salary of non officers= 120; total officers= 35; find total non officers=?
175 70
105
140
140

25. A student's mark was wrongly entered as 83 instead of 65
A student's mark was wrongly entered as 83 instead of 65. Due to that the average marks for the class got increased by half 1/2. What is the number of students in the class? 9 18 27 36 36

26. The average salary of all the workers in a workshop is Rs. 8000
The average salary of all the workers in a workshop is Rs The average salary of 8 technicians is Rs and the average salary of non technicians is Rs How many workers are there in the workshop? 4 8 16 24 24

27. Average marks of 66 students is 35
Average marks of 66 students is 35. If the average marks of the first 22 students is 57, what is the average marks of the rest? 24 38 46 79 24

28. A batsman makes a score of 87 runs in the 17th innings and thus increases his average by 3. Find his average after 17 innings. 36 39 40 60
Sol: Let average after 17th inning=x
Then average before 16th inning=x-3
(x-3) +87=17x
x= (87-48)
x=39 Or
16*x+1*87=17(x+3)
16 x + 87=17x + 51
x= 36
So average after 17th innings will be (x+3)=39.

29. A batsman makes 80 runs in his 18th inning thereby his average decreases by 3, find his average after 18th inning. 23 26
131
134
Sol: Let average after 18th inning=x
Then average before 17th inning=x+3
17(x+3) +80=18x
17x = 18x
x=131 Or
17 *x + 1*80=18(x-3)
17x + 80=18x -54
x= 134
Average after 18th inning will be = 131
So average after 17th innings will be (x+3)=39.
131

30. What is the average of 2, 4, 6, …… 242?
121
121.5
122
None of these
122

32. What is the average of 1, 3, 5,…… 10150
50.5 51
None of these 51

33. The average weight of 15 persons is decreased by 2 kg when one of them whose weight is 70 kg is replaced by a new person. What is the weight of the new person? 30 40 50
110 40

34. A father said to his son “I was as old as you are at present at the time of your birth, If father's age is 40 years now, the age of son after 6 years will be:- 20 26 23 25

35. My brother is 3 years elder to me
My brother is 3 years elder to me. My father was 28 years old when my sister was born, while my mother was 26 years old when I was born. If my sister was 4 years old when my brother was born, then what was the age of my father and mother when my brother was born???
32,24
33,23
32,23
33,24

36. The ratio between the present ages of A and B is 5:3, the ratio between A’s age 4 years ago and B’s age 4 years hence is 1:1, What is the ratio between A’s age 4 years hence and B’s age 4 years ago??
3:2
3:1
1:3
2:3
3:1

37. If 1 ½ years is added to 3/7th of the age of Ravi, it will be half of his present age. What is his present age?
14 yrs
21 yrs
28 yrs
None
21 yrs

38. One yr ago, father was 8 times as old as his son
One yr ago, father was 8 times as old as his son. Now, his age is the square of his son’s age. Find the age of the father 24 49 48 25 49

39. The ratio of father’s age to his son’s age is 4:1
The ratio of father’s age to his son’s age is 4:1. The product of their ages is 196. What will be the ratio of their ages after 5 years?
3:2
4:1
11:4
11:4

40. Find the present age of the woman , whose age after15 years ago was equal to the sum of the ages that her two children will be 15 years from now. The younger child, 5 yrs from now , will be 17 and the elder 12 yrs ago was double the age of the younger 3yrs ago.
80 yrs
87 yrs
75 yrs
70 yrs
Sol:
W-15=Y+E=30
Y+5= 17
Y’s present age= 12
E – 12 = 2 ( Y – 3 )
E=2(12-3) + 12
E=18+12
E= 30 yrs
W-15= (E+Y)+30 W=
Ans: W=87 yrs

41. The ratio of present ages of father and son is 4:1
The ratio of present ages of father and son is 4:1. The father was 36 years old when his daughter, who is 6 years younger to his son was born. Find the present ages in years of father and son
8, 12
32, 8
40, 10
60, 15
f/s=4/1
f=36 when s=6
Difference in age=30
Options:
40-10=30
Ans: 40, 10