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 ? | 29 Yes | 7 No |
Define what is meant by led?
from 5v,50ma how can i get 5v,1amp draw the power supply diagram
Hi in PCB design what the formula for the trace with calculation.
Explain why does all cellular networks have same shape of sim?
duplex system means
What is q-meter?
What is cmr?
IAM COLOR BLIND WHAT IS ELEGIBILITY FOR JUNIOR EXECUTIVE (ELECTRONICS)MEDICAL
The determinant of matrix is
In the 8421 BCD code the decimal number 125 is written as???
What are octal and hexadecimal systems?
Define what is meant by small signal amplifier?