Question

If the digit 1 is placed after a two digit number whose tens digit is ‘t’ and units digit is ‘u’, which of these options represents the new number?

• A. $100t+10u+1$
• B. $t\times u\times 1$
• C. $t+u+1$
• D. $10t+u+1$

Answer 1

The correct option is A $100t+10u+1$

Placing ‘1’ as indicated in the problem, shifts the given digits to the left by one place, so that ‘t’ is now the hundreds digit and ‘u’ is now the tens digit. 1 is in units digit place. The number is:
$\therefore 100t+10u+1$