1. Ray writes a two digit number. He sees that the number exceeds 4 times the sum of its digits by 3. If the number is increased by 18, the result is the same as the number formed by reversing the digits. Find the number.
a) 35
b) 42
c) 49
d) 57
Answer / ram
Solution: Let the two digit number be xy.
4(x + y) +3 = 10x + y .......(1)
10x + y + 18 = 10 y + x ....(2)
Solving 1st equation we get 2x - y = 1 .....(3)
Solving 2nd equation we get y - x = 2 .....(4)
Solving 3 and 4, we get x = 3 and y = 5
| Is This Answer Correct ? | 30 Yes | 7 No |
What is the condition to be satisfied in the selection of l and c in a series inverter?
What is the difference between leds and pn junction diode?
How many states does signal has?
The magnitude of the gain or integrator transfer function using op-amp is A WR1Cf B -1/WR1Cf C -WR1Cf D 1/WR1Cf
FULL FORM OF SCR
iam working as field engineer since 3 years so what is the appropriate answer for changing company i'e., why do u want to change ur present company
How many memory locations can be addressed by a microprocessor with 14 address lines?
What is meant by retrace time?
What is the right Step of Commissioning? (Commissioning, Hub Manager, Hardware)
Explain Speech Coding.
What is meant by cyclo-converter?
Which uplink/downlink spectrum is allocated to GSM-900?
Civil Engineering (5086)
Mechanical Engineering (4456)
Electrical Engineering (16639)
Electronics Communications (3918)
Chemical Engineering (1095)
Aeronautical Engineering (239)
Bio Engineering (96)
Metallurgy (361)
Industrial Engineering (259)
Instrumentation (3014)
Automobile Engineering (332)
Mechatronics Engineering (97)
Marine Engineering (124)
Power Plant Engineering (172)
Textile Engineering (575)
Production Engineering (25)
Satellite Systems Engineering (106)
Engineering AllOther (1379)