Finding Two-Digit Numbers: Matching Tens and Units Digits Problem

To solve this problem, we need to identify a number whose tens digit is the same as its units digit from the given options:

• Options given are:

  • $1$
  • $20$
  • $77$
  • $85$

• Examine each number:

  • $1$: This is a one-digit number, not applicable.
  • $20$: Tens digit is $2$, units digit is $0$. They are not equal.
  • $77$: Tens digit is $7$, units digit is $7$. They are equal.
  • $85$: Tens digit is $8$, units digit is $5$. They are not equal.

Therefore, the number where the tens digit equals the units digit is $77$.