Find the sum of digits of the resultant number in square of 2245?

The regular method will be to multiply 2245 with 2245 and then add the digits of the resultant number. Do we have any other simpler method? Any tip or rule? (Asked by Raina's parent)

dear experts,in maths practice if we input the correct answer it says it is wrong

ex:92721

x 3

278163(my input)

potu's reply: wrong

92721

288163(potu's reply)

many more questions are like this,EXPERTS please recnify these mistakes please as if that one was correct i would have got a crown

why do we do division started by left but not by right 9/108-12 but why dont right side 9/108-021

9018723465 -:- 1230654789

what is (99)^{2}

28854 dived by 9

It is very urgent

Find the sum of digits of the resultant number in square of 2245?

The regular method will be to multiply 2245 with 2245 and then add the digits of the resultant number. Do we have any other simpler method? Any tip or rule? (Asked by Raina's parent)

dear experts,in maths practice if we input the correct answer it says it is wrong

ex:92721

x 3

278163(my input)

potu's reply: wrong

92721

x 3

288163(potu's reply)

many more questions are like this,EXPERTS please recnify these mistakes please as if that one was correct i would have got a crown

why do we do division started by left but not by right 9/108-12 but why dont right side 9/108-021

9018723465 -:- 1230654789

what is (99)

^{2}28854 dived by 9

many balls will be there in each box? How many balls will be left out?