Question

một số được viết bằng 2006 chữ số 7. hỏi phải cộng thêm vào số đó ít nhất bao nhiêu đơn vị để được một số chia hết cho 63 ?

Answer 1

1 số được viết bằng 2006 chữ số 7 => số đó chia hết cho 7

Mà 7 và 9 là hai số nguyên tố cùng nhau nên số chia hết cho 7 và 9 sẽ chia hết cho 63

Tổng các chữ số là: 2006 x 7 = 14042 chia 9 dư 2

=> Cần thêm vào số đó 7 đơn vị để được số chia hết cho 7 và 9 <=> chia hết cho 63

bạn k mình câu trước luôn nha thank

Answer 2

2006 + 7 - 63=1950

Answer 3

phải thêm vào 7

Answer 4

1 số được viết bằng 2006 chữ số 7 => số đó chia hết cho 7

Mà 7 và 9 là hai số nguyên tố cùng nhau nên số chia hết cho 7 và 9 sẽ chia hết cho 63

Tổng các chữ số là: 2006 x 7 = 14042 chia 9 dư 2

=> Cần thêm vào số đó 7 đơn vị để được số chia hết cho 7 và 9 <=> chia hết cho 63

Answer 5

thêm vào 7

Answer 6

2909+2909=? giải tiếp

Answer 7

 dam an la 5818

co ai giai duoc khong vay

Answer 8

phải là 35 chứ

Answer 9

bằng 15

Answer 10

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1,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬1,111,111,111,111,111‬

Answer 11

phải thêm vào 7 nha