Question

The sum of the two digits of a 2-digit number is 15. If the digits are reversed, the new number is 27 more than the original number. Find the original number.​

Answer 1

Answer:

69

Step-by-step explanation:

You can do a trial and error strategy. so Think of two numbers first that will sum up to 15, which in this case are: 6 and 9, 7 and 8. Then you can now do the trial and error to which you'll have to subtract the reverse of the number to check if their difference is 27.

96 minus 69 is 27 while 87 minus 78 is only 9.

This means that 69 is the first number.