Saved Bookmarks
| 1. |
How many 6 digit numbers are divisible either by 3 or 7 but not by 42? |
|
Answer» Greatest 6 DIGIT number which is divisble by 3 = 999999 Smallest 6 digit number which is DIVISIBLE by 3 (a)= 100002 d=3 numbers = n 100002 + (n-1)3 = 999999 (n-1)3 = 899997 n-1 = 299999 n = 299998 Greatest 6 digit number which is divisble by 7 = 999999 Smallest 6 digit number which is divisible by 7 (a)= 100002 d=7 numbers = n 100002 + (n-1)7 = 999999 (n-1)7 = 899997 n-1 = 128571 n = 128570 numbers divisible by 3 = 299998 Numbers divisible by 7 = 128570 |
|