MAGIC MATH

SQUARING ANY NUMBER ENDING IN 1.

RULE: First, square the number to the left to the units digit. Then double the number to the left of the units digit. Add the tens (or hundred) place digit of this result to the square found in the first steps. And affix units digit found in second steps to the result found in third steps. The units of the answer is always 1.

CONSIDER THE FOLLOWING EXAMPLES :

1) square 41

Solution : Square of 4 is 16 And double of 4 is 8.

Hence square of 41 is 1681.

2) square 61.

Solution : Square of 6 is 36 and double of 6 is 12 so we will add 1 in 36 and affix 2.

thus we have 372. Now final answer is 3721.

3)square 251.

Solution : square of 25 is 625 and double of 25 is 50. So we will add 5 in 625 and affix 0.

thus we have 6300. Now final answer is 63001.