Question

In the number 379-05. replace by a digit, so that the
resulting number are divisible by 9.​

Answer 1

Answer:

hiiii Thanks for the free point

Answer 2

Step-by-step explanation:

ANSWER

(a) 12525∗2

First adding all the digits of the given number.

∴1+2+5+2+5+∗+2=17+∗

For 12525∗2 to be divisible by 9, 17+∗ must be divisible by 9.

Again adding the digits of 1+7+∗

1+7+∗=8+∗, which must be equal to 9.

i.e., 8+∗=9

⇒∗=9−8=1.

If ∗=1,17+∗=17+1=18, which Is a multiple of 9.

∴1252512 is the required number.

(b) 251∗3373

Firstly add the digits of the given number.

i.e., 2+5+1+∗+3+3+7+3=24+∗, which must be a multiple of 9

Again adding the digits of 24+∗

i.e., 2+4+∗=6+∗ which must be equal to 9.

i.e., 6+∗=9

⇒∗=9−6

⇒∗=3

If ∗=3, then 24+∗=24+3=27, which is a multiple of 9.

∴25133373 is the required number.