Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q351. | What would be the compound interest obtained on an amount of Rs.4400 at the rate of 10% p.a. after 2 years ? |
| 1) | Rs. 886 |
2) | Rs.910 |
| 3) | Rs.924 |
4) | Rs. 954 |
| 5) | None of these |
Answer : Rs.910
Explanation : Amount = 4400 ( 1+10/100)2 = 5324
Therefore,CI = 5324 - 4400 = 924
View AnswerQ352. | Rs. 3757 is to be divided between A and B such that A’s share at the end of 7 years may be equal to B’s share at the end of 9 years. If rate percent be 10% p.a. compound Interset, B’s share is - |
| 1) | Rs. 1700 |
2) | Rs. 1500 |
| 3) | Rs. 2057 |
4) | Rs. 1400 |
| 5) | None of these |
Answer : Rs. 1700
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Q353. | If the simple interest on a sum of money for 2 years at 5% p.a. is Rs. 50. What is the compound interest on the same sum at the same rate and for the same time ? |
| 1) | Rs. 54.25 |
2) | Rs. 52 |
| 3) | Rs. 51.25 |
4) | Rs. 60.50 |
| 5) | None of these |
Answer : Rs. 51.25
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Q354. | A freight train left, Bhubaneswar for Chennai at an average speed of 40 km/hr. Two hours later, an express train left Bhubaneswar for Chennai following the freight train on a parallel track at an average speed of 60 km/hr. How far from Delhi would the express train meet the freight train ? |
| 1) | 220km |
2) | 240km |
| 3) | 250 km |
4) | 260 km |
| 5) | None of these |
Answer : 240km
Explanation : The first train after 2hours covers a distance 40 x 2 = 80 kms.
Then, the second train starts and time for both trains is same .
According to relative speed formula, the relative speed in same direction = 60 - 40 =20kmph
So, time taken to cover the 80km = 80/20= 4 hrs
Therefore, the total distance = 60 x 4 = 240kms.
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Q355. | Directions: In a survey of a locality,the number of male adults and female non-adults in 30 each. The number of female adults and male non adults in 20 each. Every female adult is well versed in at least one of the two languages - Hindi and English. Every male non adu1t is well-versed with at least one of the two languages - Hindi and English. There are 7 male adults and 8 female non-adults do not know any of the two languages. There are10 male non-adults and 18 female adults are well versed in both the languages. There are 20 male adults and 17 female non-adults are well versed in only one of the two languages.
Based on the information given above answer the next four items:
What is the number of persons who can talk to each other both the languages ?
|
| 1) | 25 |
2) | 36 |
| 3) | 42 |
4) | Can't be determined |
| 5) | None of these |
Answer : 36
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Q356. | Directions: In a survey of a locality,the number of male adults and female non-adults in 30 each. The number of female adults and male non adults in 20 each. Every female adult is well versed in at least one of the two languages - Hindi and English. Every male non adu1t is well-versed with at least one of the two languages - Hindi and English. There are 7 male adults and 8 female non-adults do not know any of the two languages. There are10 male non-adults and 18 female adults are well versed in both the languages. There are 20 male adults and 17 female non-adults are well versed in only one of the two languages.
Based on the information given above answer the next four items:
What is the number of non adults who are well versed in at least one of the two languages ? |
| 1) | 24 |
2) | 28 |
| 3) | 42 |
4) | Can't be determined |
| 5) | None of these |
Answer : 42
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Q357. | Directions: In a survey of a locality,the number of male adults and female non-adults in 30 each. The number of female adults and male non adults in 20 each. Every female adult is well versed in at least one of the two languages - Hindi and English. Every male non adult is well-versed with at least one of the two languages - Hindi and English. There are 7 male adults and 8 female non-adults do not know any of the two languages. There are10 male non-adults and 18 female adults are well versed in both the languages. There are 20 male adults and 17 female non-adults are well versed in only one of the two languages.
Based on the information given above answer the next four items:
What is the number of males who are well-versed in Hindi only ? |
| 1) | 10 |
2) | 20 |
| 3) | 32 |
4) | Can't be determined |
| 5) | None of these |
Answer : Can't be determined
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Q358. | Directions: In a survey of a locality,the number of male adults and female non-adults in 30 each. The number of female adults and male non adults in 20 each. Every female adult is well versed in at least one of the two languages - Hindi and English. Every male non adu1t is well-versed with at least one of the two languages - Hindi and English. There are 7 male adults and 8 female non-adults do not know any of the two languages. There are10 male non-adults and 18 female adults are well versed in both the languages. There are 20 male adults and 17 female non-adults are well versed in only one of the two languages.
Based on the information given above answer the next four items:
What is the number of females who are well-versed in both the languages ? |
| 1) | 20 |
2) | 22 |
| 3) | 23 |
4) | Can't be determined |
| 5) | None of these |
Answer : 23
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Q359. | In an examination, a student's average marks were 63. If he had obtained 20 more marks for his Mathematics and 2 more marks for his Geography, his average would have been 65. How many subjects were there in the examination ? |
| 1) | 8 |
2) | 10 |
| 3) | 11 |
4) | 14 |
| 5) | None of these |
Answer : 11
Explanation : Let, the number of subjects = x
Then, Total marks he scored for all subjects = 63x
If he had obtained 20 more marks for his mathematics and 2 more marks for his geography, his average would have been 65.
=> Total marks he would have scored for all subjects = 65x
Now, we can form the equation as 65x - 63x = the additional marks of the student
= 20 + 2 = 22
=> 2x = 22
=>x=22/2=11
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Q360. | A batsman makes a score of 96 runs in the 16th innings and thus increases his averages by 2. What is his average runs after 16th innings ? |
| 1) | 62 |
2) | 64 |
| 3) | 66 |
4) | 72 |
| 5) | None of these |
Answer : 66
Explanation : Let, the average up to 15th innings = x.
Total runs scored in 15 innings = 15x
Then average after 16 innings = (x+2).
Total runs scored in 16 innings = (15x + 96)
So, (15x + 96)/16 = (x+2)
=> 15x + 96 = 16x + 32
=> x = 64
Therefore, his average run after 16th innings is 64+2= 66 runs.
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