Question

Match the numbers with their squares.
$$\begin{array}{cc}1.16& a.361\\ 2.23& b.256\\ 3.19& c.625\\ 4.25& d.529\end{array}$$

• A. 1 - a; 2 - c; 3 - b; 4 - d
• B. 1 - d; 2 - b; 3 - c; 4 - a
• C. 1 - c; 2 - d; 3 - c; 4 - b
• D. 1 - b; 2 - d; 3 - a; 4 - c

Answer 1

The correct option is D

1 - b; 2 - d; 3 - a; 4 - c

$(16{)}^2$ = 256

$(19{)}^2$ = 361

$(23{)}^2$ = 529

$(25{)}^2$ = 625

Alternative method:

Arrange the numbers in ascending order.

16 $<$ 19 $<$ 23 $<$ 25

So, the squares must be in ascending order, arrange the squares in ascending order.

256 $<$ 361 $<$ 529 $<$ 625