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To find the sum of the arithmetic sequence from 3 to 90 that is divisible by 5, we first identify the terms: the first term is 5 and the last term is 90. The sequence of terms divisible by 5 is 5, 10, 15, ..., 90. This is an arithmetic sequence where the first term (a = 5), the last term (l = 90), and the common difference (d = 5). The number of terms (n) can be calculated as ((l - a)/d + 1 = (90 - 5)/5 + 1 = 18). The sum (S_n) of the sequence can be calculated using the formula (S_n = n/2 \times (a + l)), resulting in (S_{18} = 18/2 \times (5 + 90) = 9 \times 95 = 855). Thus, the sum is 855.
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Why is 90 a divisible by3 or9?
Ninety is divisible by 3 because the sum of its digits (9 + 0 = 9) is divisible by 3. Additionally, it is divisible by 9 since the same sum (9) is also divisible by 9. Therefore, 90 can be evenly divided by both 3 and 9 without any remainder.
What is the sum of the exterior angle of a regular polygon?
it depends what kind of polygon but the sum of the angles will equal a # divisible by 90
Is divisible by 90 23456910?
To determine if the number 23,456,910 is divisible by 90, it must be divisible by both 9 and 10. A number is divisible by 10 if it ends in 0, which 23,456,910 does. To check for divisibility by 9, the sum of its digits (2 + 3 + 4 + 5 + 6 + 9 + 1 + 0 = 30) must be divisible by 9, which it is not. Therefore, 23,456,910 is not divisible by 90.
What numbers are divisible by 90?
Multiples of 90, like 90, 180 and 270 are divisible by 90.
Is 90 divisible by 234569 and 10?
90 is divisible by 10 since 90/10 = 9. It should be obvious that 90 is not divisible by 234,569 which is much larger than 90.
Why is 90 a divisible by3 or9?
Ninety is divisible by 3 because the sum of its digits (9 + 0 = 9) is divisible by 3. Additionally, it is divisible by 9 since the same sum (9) is also divisible by 9. Therefore, 90 can be evenly divided by both 3 and 9 without any remainder.
What is the sum of the exterior angle of a regular polygon?
it depends what kind of polygon but the sum of the angles will equal a # divisible by 90
Is divisible by 90 23456910?
To determine if the number 23,456,910 is divisible by 90, it must be divisible by both 9 and 10. A number is divisible by 10 if it ends in 0, which 23,456,910 does. To check for divisibility by 9, the sum of its digits (2 + 3 + 4 + 5 + 6 + 9 + 1 + 0 = 30) must be divisible by 9, which it is not. Therefore, 23,456,910 is not divisible by 90.
Is 90 divisible by 5 and 9?
Well, isn't that a happy little question? Let's take a closer look. If a number is divisible by 5, it must end in 0 or 5. And if a number is divisible by 9, the sum of its digits must also be divisible by 9. When we add the digits of 90 (which is 9 + 0 = 9), we see that it is divisible by 9 but not by 5.
What is 45 plus 45?
45 plus 45 is equal to 90. This is because addition is a basic arithmetic operation where two numbers are combined to find their total sum. In this case, adding 45 and 45 together results in a sum of 90.
What numbers are divisible by 90?
Multiples of 90, like 90, 180 and 270 are divisible by 90.
Is 90 divisible by 234569 and 10?
90 is divisible by 10 since 90/10 = 9. It should be obvious that 90 is not divisible by 234,569 which is much larger than 90.
What is a divisible number by 3?
6, 9, 12, 30, 60, 90, 360, 690, 930, or (162,591). Here's a secret: If the sum of a number's digits is divisible by 3, then the number is divisible by 3. That's how you can tell quickly that 162,591 is divisible by 3.
Is 90 divisible by 3 or 9?
==yes. 90 is divisible by 3 and 9==
Is 2 divisible by 90?
Yes. 90 divided by 2 equals 45.
What numbers is divisible by 90?
numbers which are divisible by 90 are the multiples of 90: 90, 180, 270, 360, 450, 540, 630,...
Is 90 divisible by 2 or 3?
The number 90 is divisible by both 2 and 3.
