Question

Square of $63$ by Sutra Urdhva-tiryagbhyam method is :

• A. $8529$
• B. $4569$
• C. $3969$
• D. $5479$

Answer 1

Answer: (C)

$3969$

To find the square of $63$

$63\times 63$

3 steps are there to solve this.

(i) Multiply the unit digits

$3\times 3=9$

(ii) Take the units and tens digit to cross multiply and add the products

$(3\times 6)+(6\times 3)=18+18=36$

Keep $6$ intact and carry forward $3$ to next step.

(iii) Multiply the tens digits

$6\times 6=36$

Add the carry forward $3$ to $36$.

$36+3=39$

Write the numbers obtained from step (iii) to (i) in order.

i.e., $3969$

This the square of $63$ is $3969$.