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The sum of the squares of three numbers is 138, while the
The sum of the squares of three numbers is 138, while the sum of their products taken two at a time is 131. Their sum is:
A. 20
B. 30
C. 40
D. 50
E. 60
- by nkmungila1
Tue Oct 03, 2017 2:44 am- Forum: Problem Solving
- Topic: The sum of the squares of three numbers is 138, while the
- Replies: 6
- Views: 5694
The difference between a two-digit number and the number
The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
A. 4
B. 8
C. 16
D. 20
E. 24
- by nkmungila1
Tue Oct 03, 2017 2:42 am- Forum: Problem Solving
- Topic: The difference between a two-digit number and the number
- Replies: 3
- Views: 9928
An error 2% in excess is made while measuring the side of a
An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:
A. 2%
B. 2.02%
C. 4%
D. 4.04%
E. 40.4 %
- by nkmungila1
Tue Oct 03, 2017 2:37 am- Forum: Problem Solving
- Topic: An error 2% in excess is made while measuring the side of a
- Replies: 2
- Views: 3211
A library has an average of 510 visitors on Sundays and 24
A library has an average of 510 visitors on Sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a Sunday is
[A]. 250
. 276
[C]. 280
[D]. 285
[E]. 290
- by nkmungila1
Tue Oct 03, 2017 2:32 am- Forum: Problem Solving
- Topic: A library has an average of 510 visitors on Sundays and 24
- Replies: 4
- Views: 2482
A bike running at 80 km/h initially is slowed down to
A bike running at 80 km/h initially is slowed down to 60 km/h as soon as the fuel indicator touches the half level mark. It keeps running at this speed till it runs out of fuel, thereby covering a total distance of 640 km in 10 hours. If the bike consumes 2 litres of fuel per hour, what is the capac...
- by nkmungila1
Sun Oct 01, 2017 3:14 am- Forum: Problem Solving
- Topic: A bike running at 80 km/h initially is slowed down to
- Replies: 2
- Views: 1379