Mathmetics
ISBT Mathmetics for all banking PO,Clerk,IBPS PO,Railway,SSC,IAS,OAS Exams
Q591. | The sum of two number is 25 and their difference is 13. Find their product. |
1) | 104 | 2) | 114 |
3) | 315 | 4) | 325 |
5) | None of these |
Answer : 114
Explanation : Explanation:
Let the numbers be x and y.
Then, x + y = 25 and x - y = 13.
4xy = (x + y)2 - (x- y)2 = (25)2 - (13)2
= (625 - 169) = 456
So, xy = 114.
Explanation : Explanation:
Let the numbers be x and y.
Then, x + y = 25 and x - y = 13.
4xy = (x + y)2 - (x- y)2 = (25)2 - (13)2
= (625 - 169) = 456
So, xy = 114.

Q592. | Find the two natural numbers whose sum is 85 and the LCM is 102 |
1) | 1) 30 and 55 | 2) | 2) 17 and 68 |
3) | 3) 35 and 55 | 4) | 4) 51 and 34 |
5) | 5) None of these |
Answer : 4) 51 and 34

Q593. | The H.C.F. of two numbers is 11 and their L.C.M. is 693. If one of the numbers is 77, find the other. |
1) | 1) 909 | 2) | 2) 119 |
3) | 3) 66 | 4) | 4) 99 |
5) | 5) None of these |
Answer : 4) 99

Q594. | A boat running downstream covers a distance of 24 kms in 4hrs while for covering the distance upstream it takes 6 hrs. What is the speed of the boat in still water ? |
1) | 5.5 km/hr | 2) | 6 km/hr |
3) | 3.5 km/hr | 4) | 4.5 km/hr |
5) | None of these |
Answer : None of these
Explanation : Ans. 5 km/hr
Explanation : Ans. 5 km/hr

Q595. | 23 x 15 / 25 + 48.2 = -35 + ? |
1) | 97 | 2) | 98 |
3) | 95 | 4) | 96 |
5) | None of these |
Answer : 97

Q596. | (562 - 754) /6 = ? / (-5) |
1) | -120 | 2) | 120 |
3) | -160 | 4) | 160 |
5) | None of these |
Answer : 160

Q597. | 5/11 of 55% of 1500 ? |
1) | 395 | 2) | 392 |
3) | 375 | 4) | 372 |
5) | None of these |
Answer : 375

Q598. | (35.2 x 15 x 4) / 12 + 20 = (?)2 |
1) | (14)2 | 2) | 14 |
3) | 16 | 4) | (14)1/2 |
5) | None of these |
Answer : 14

Q599. | (3 x 4)2 x (3 x 6) / ( 9 x 5) = ? |
1) | 57.6 | 2) | 59.6 |
3) | 53.2 | 4) | 51.2 |
5) | None of these |
Answer : 57.6
