Question

any tricks for 3 digit square no?​

Answer 1

Answer:

Find the square of the number formed by last 2 digit of given 3 digit number i.e. 91. Step 2: Now multiply the first and last digit, double the product and add it to the first 2 digits of step 1, i.e. 3*1=3 and doubling it we get 6. So, at the end of step 2, your answer is 8881.

Answer 2

Answer:

STEP 1.         Last digit = last digit of SQ (Z)

STEP 2.        Second Last Digit = 2*Y*Z +  carryover from STEP 1.

STEP 3.        Third Last Digit 2*X*Z+ Sq (Y) +  carryover from STEP 2.

STEP 4.        Fourth last digit is 2*X*Y +  carryover from STEP 3.

STEP 5.        In the beginning of the result (the first digit) will be Sq (X) + any carryover from Step 4.

For those who got confused with the above formula, we have some examples shown below:

Examples to calculate square of 3 digit numbers quickly

What is the Square of 421

STEP 1.           Last digit = last digit of SQ (1) =1

STEP 2.          Second Last Digit = 2*2*1 + any carryover from STEP 1= 4

STEP 3.          Third Last Digit 2*4*1+ Square (2) + any carryover from STEP 2=8+4=12

As, a result 2 would be the third last digit and 1 is the carryover.

STEP 4.          Fourth last digit is 2*4*2 + any carryover (which is 1) = 16+1=17.

So, 7 is the digit and carry over 1.

STEP 5.         In the beginning  result will be Sq (4) + any carryover from Step 4.

So 16+1 =17.

So the final result will be  177241.

Step-by-step explanation:

mark as brainliest..