Question

find the square of 345 using diagonal method
choose the correct answer for question
A. 0,63504
B. 119025
C. 564167
D. 174980​

Answer 1

Answer:

the square of 345 by diagonal method is 119025 .

Answer is B

Step-by-step explanation:

for the diagonal method , draw a square and divide it into 9 squares . then again divide each square diagonally . Now write the numbers 3 4 5 across the outer square as shown in the picture . Now multiply each vertical digit with the coresponding Horizontal digit and fill all the diagonals . example 3 in the horizontal with 3 in the vertical will 9 . represent this in the first square as 0 and 9 as shown in the pic . Repeat the same for all and complete the squares . Now add the digits diagonally .start from the right which is the smallest diagonal .make a note of the UNITS digit in the answer from Right . Here it is 5 . Repeat the addition for other sqaures as well . sum of the digits of the second square is 0+2+0$0+0+2=2$ .make a note of this in the answer , no the answer is 25 , repeat the same for the next diagonal the sum is 20 . so make a note of  the Units place which is 0 in the answer and carry 2 .  so now the answer is 025 .

now we have 2 in the next diagonal and the sum of the digits is 9. so add this unit place  to the answer , now the answer is 9025 . next diagonal sum is 11 , add 1 to the answer which is now 19025 and carry the 1 . now add the digits in the last diagonal and sum of the digits in the last diagonal is 1 . so the final answer is 119025

Answer 2

Answer:

for the diagonal method , draw a square and divide it into 9 squares . then again divide each square diagonally . Now write the numbers 3 4 5 across the outer square as shown in the picture . Now multiply each vertical digit with the coresponding Horizontal digit and fill all the diagonals . example 3 in the horizontal with 3 in the vertical will 9 . represent this in the first square as 0 and 9 as shown in the pic . Repeat the same for all and complete the squares . Now add the digits diagonally .start from the right which is the smallest diagonal .make a note of the UNITS digit in the answer from Right . Here it is 5 . Repeat the addition for other sqaures as well . sum of the digits of the second square is 0+2+00+0+2=20+0+2=2 .make a note of this in the answer , no the answer is 25 , repeat the same for the next diagonal the sum is 20 . so make a note of the Units place which is 0 in the answer and carry 2 . so now the answer is 025 .

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