Question

b) The digit in the ones place of a 2-digit number is twice the digit at the tens
place. Write the number​

Answer 1

constrain is x=2y where x=unit place digit & y=ten’s place digit & xy= the two digit number

put y=1 we get x=2

put y=2 we get x=4

put y=3 we get x=6

put y=4 we get x=8

put y=5 we get x=10

stop the last line not giving two digit number so we got only 4 numbers thus the answer of question is 12,24,36,48.