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Only 9 and 15 are odd so the rest can be rejected.
9 is not a triangular number so only 15 is odd and a triangular number.
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∙ 12y ago
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Is 8 triangular number?
No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
What is the next triangular number after 10?
15 (1 + 2 + 3 + 4 + 5).
Which number doesn't belong 6 10 12 15?
15 because its an odd number whereas 6, 10 & 12 are even numbers.
Which is the 5th triangular number?
15
How many odd numbers on a dartboard?
There are 10 odd number segments on the dart board: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 Some people also count the single bull (25) as an odd number.
Is 32 a triangular number?
32 is not a triangular number. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, ...
Is 4 a triangular number?
no No it is not. The first 5 triangular numbers are: 1, 3, 6, 10, 15
What is the odd number between 10 and 21 which is not prime?
15
Is 8 triangular number?
No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
What is the fifth triangular number?
The fifth triangular number is 15
What is the odd number between 10 and 20that are not prime number?
The numbers between 10 and 20 that are not prime are 12, 14, 15, 16 and 18. So 15 is the odd number and the rest are even numbers.
What is the number that is divisible by 3 and 5 but not 10?
15 and any odd multiple of 15.
What is 15 a odd or a even number?
15 is an odd number.
Is 15 an odd number?
Yes, 15 is an odd number.
What is the next triangular number after 10?
15 (1 + 2 + 3 + 4 + 5).
What triangular number has 4 factors?
6, 10, 15, 21, 55, 91...
Which number from 10 to 20 has a odd number?
11, 13, 15, 17, and 19 does.
