Question

1) check the divisibility conditions of 7,9 for the following numbers i) 666666 ii) 20691 2) check the divisibility conditions of 11 for the following numbers i) 123456789 ii) 777777 3) check the divisibility conditions of 8, 9, for the following numbers i) 234567 ii) 122120 4) check the divisibility conditions of 7,11 for the following numbers i) 342384 ii) 95018 5) check the divisibility conditions of 8,9,11 for the following numbers i) 194832 ii) 333333​

Answer 1

Answer:

(i)

Step-by-step explanation:

divisibility of 7:-

take the last digit of the number ,double it, then subtract the result from rest of the number if resulting number is evenly divisible by 7 then the number is divisible by 7 .

divisibility by 9:-

sum all the digits of the no. if the result is divisible by 9 then the whole no. is divisible by 9

divisibility by 11:-

from the right side of the no. take the even place digits and sum up them.

now,

from the right side of the no. take the odd place digits and sum up them.

then,

subtract even place digits sum from odd place digits sum.