Question

Choose the largest among the following.

• A. 78
• B. 56
• C. 45
• D. 81

Answer 1

The correct option is D 81

Since the number of digits of the numbers is same, we compare the place value of the digits.

$\begin{array}{ccc}\text{Number}& \text{Number of}& \text{Number of}\\ & \text{tens}& \text{ones}\\ 78& 7& 8\\ 56& 5& 6\\ 45& 4& 5\\ 81& 8& 1\end{array}$

Greater the number of tens, greater is the number.
Thus, $81>78>56>45.$
That is, 81 is the greatest of the lot.