Saved Bookmarks
| 1. |
2.basethrceWhat is the least positive two-digit base-three integer that is not divisible by 2?Express your answer in base threc. |
|
Answer» Answer: The sum of all two DIGIT numbers which are not divisible by 2 or 3 is. Step-by-step explanation: The sum of all two digit numbers which are not divisible by 2 or 3 is Share Study later ANSWER Sum of all digits from 10 to 99 is S n
= 2 n
[2a+(n−1)d] S n
= 2 90
[2(10)+(90−1)1] S n
=4905. Sum of digits divisible by 2 from 10 to 99 is S n
= 2 n
[2a+(n−1)d] S n
= 2 45
[2(10)+(45−1)2] S n
=2430 Sum of digits divisible by 3 from 10 to 99 is S n
= 2 n
[2a+(n−1)d] S n
= 2 30
[2(12)+(30−1)3] S n
=1665 Sum of digits divisible by 6 from 10 to 99 is S n
= 2 n
[2a+(n−1)d] S n
= 2 15
[2(12)+(15−1)6] S n
=810 The sum of all two digit numbers which are not divisible by 2 or 3 is 4905−2430−1665+810 is 1620. |
|