Quantitative aptitude Question for all banking Bank PO,Clerk,IBPS PO,Railway,SSC,PSUs,IAS,OAS ,C-SAT Exams

Mathmetics

ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams

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Q591.

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

1)	76 kg	2)	76.5 kg
3)	85 kg	4)	Data Inadequate
5)	None of these

Answer : 85 kg
Explanation :

Total weight increased = (8 x 2.5) kg = 20 kg.

So,weight of new person = (65 + 20) kg = 85 kg.

View Answer

Q592.

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

1)	35 years	2)	40 years
3)	50 years	4)	Data Inadequate
5)	None of these

Answer : 40 years
Explanation :

Sum of the present ages of husband, wife and child = (27 x 3 + 3 x 3) years = 90 years.

Sum of the present ages of wife and child = (20 x 2 + 5 x 2) years = 50 years.

Husband's present age = (90 - 50) years = 40 years.

View Answer

Q593.

A batsman has a certain average of runs for 12 innings. In the 13th innings he scores 96 runs, there by increasing his average by 5 runs. What is his average after 13th innings ?

1)	34	2)	31
3)	36	4)	32
5)	None of these

Answer : 36
Explanation :

Let the batsman�s average runs up to 12th innings was x.

Total run = 12 x.

Now total run up to 13th innings = (12 x + 96)

According to equation = (12 x + 96)/13 = x + 5 or x = 31.

So, after 13th innings average will be 31 + 5 = 36.

Shortcut Method :

96 - (135) + 5 = 36

View Answer

Q594.

The average salary of workers of a Factory is Rs.6000. While the average salary of 150 technician is Rs.12000 and that of the non-technician is Rs. 3750/-. Find the total member of the Factory.

1)	500	2)	600
3)	550	4)	480
5)	None of these

Answer : 550
Explanation :

By alligantion method :

12000 3750

6000

6000 - 3750 = 2250 12000 - 6000 = 6000

So, final ratio = 2250 : 6000 = 3 : 8

So,total number of employees = (150/3) x 11 = 550

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Q595.

The average mark of 48 students in a class is 45. The average marks of the boys in the class is 40 & the average mark of the girls in the class is 50. What is the ratio between the number of boys and girls in the class ?

1)	3:5	2)	1:1
3)	4:5	4)	D.I
5)	None of these

Answer : 1:1
Explanation :

With the help of alligation method :

50 40

45 - 40 = 5 50 - 45 = 5

So, final ratio = 5 : 5 = 1 : 1

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Q596.

The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

1)	279	2)	283
3)	308	4)	318
5)	None of these

Answer : 308
Explanation : We know that H.C.F x L.C.M = Product of two numbers

So,other number = (11 x 7700)/275 = 308.

View Answer

Q597.

The least number which when divided by 5, 6 , 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:

1)	1677	2)	1683
3)	2523	4)	3363
5)	None of these

Answer : 1683
Explanation :

L.C.M. of 5, 6, 7, 8 = 840.

Required number is of the form 840k + 3

Least value of k for which (840k + 3) is divisible by 9 is k = 2.

Required number = (840 x 2 + 3) = 1683.

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Q598.

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?

1)	196	2)	630
3)	1260	4)	2520
5)	None of these

Answer : 630
Explanation :

L.C.M. of 12, 18, 21 30 = 1260.

Required number = (1260 � 2) = 630.

View Answer

Q599.

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

1)	1	2)	2
3)	3	4)	4
5)	None of these

Answer : 2
Explanation :

Let the numbers 13a and 13b.

Then, 13a x 13b = 2028

ab = 12.

Now, the co-primes with product 12 are (1, 12) and (3, 4).

So, the required numbers are (13 x 1, 13 x 12) and

(13 x 3, 13 x 4).

Clearly, there are 2 such pairs.

View Answer

Q600.

The product of two numbers is 120 and the sum of their squares is 289. The sum of the number is:

1)	20	2)	23
3)	169	4)	400
5)	None of these

Answer : 23
Explanation :

Let the numbers be x and y.

Then, xy = 120 and x² + y²= 289.

(x + y)² = x² + y²+ 2xy = 289 + (2 x 120) = 529

x + y = 23.

View Answer

Previous 1 2...55 56 57 58 596061 62 63 Next

Mathmetics

Q591.

The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person ?

Q592.

The average age of husband, wife and their child 3 years ago was 27 years and that of wife and the child 5 years ago was 20 years. The present age of the husband is:

Q593.

A batsman has a certain average of runs for 12 innings. In the 13th innings he scores 96 runs, there by increasing his average by 5 runs. What is his average after 13th innings ?

Q594.

The average salary of workers of a Factory is Rs.6000. While the average salary of 150 technician is Rs.12000 and that of the non-technician is Rs. 3750/-. Find the total member of the Factory.

Q595.

The average mark of 48 students in a class is 45. The average marks of the boys in the class is 40 & the average mark of the girls in the class is 50. What is the ratio between the number of boys and girls in the class ?

Q596.

The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:

Q597.

The least number which when divided by 5, 6 , 7 and 8 leaves a remainder 3, but when divided by 9 leaves no remainder, is:

Q598.

What will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30 ?

Q599.

The product of two numbers is 2028 and their H.C.F. is 13. The number of such pairs is:

Q600.

The product of two numbers is 120 and the sum of their squares is 289. The sum of the number is:

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