Question

If 123456789101112..........50.this number is divided by 9 then find रिमाइंडर?

Answer 1

so first we need to know divisibility rule of 9 which is sum of all digits in the number and with this you can even get remainder

so first sum of 1 to 9

we can find this with ap formula

(first digit+ last digit)×no.of digit ÷2

(1+9)×9÷2

45

now for other digits

45 +1 +0 =46

1+1+1+2+1+3+14......+1+9+2+0

=56[you don't need to add 1 to 9 coz you already know it's 45 just add other digits

2+1+2+2+2+3....+2+9+3+0

=66

next will be 76

next 86

add then

m you'll get 330 add these too 3+3+0 =6

so answer is 6

also see this trick too

when you'll add 31to 40 individually ans will be 45+[3×10] +1 that is 45 +31 same with other like for 21 to 30 its gonna be 45+21

hope it helped you

I'm sorry if I couldn't explain it well its my first time answering

also if there's any other method would love to know