They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.
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.
No. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, ...
21
It can be hard to answer questions of this type based on only three examples. However, that does happen to be the start of the sequence called the "triangular numbers" ... that is, those quantities that can be arranged in an equilateral triangle (like bowling pins or billiard balls). The next number in the triangular sequence is 10 (followed by 15, 21, 28, etc).
They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.They don't necesarily,3 is a triangular number and 10 is a triangular number. Their sum is 13 which is not a square number.
The Fourth Triangular Number is 10.
230
No 10 is though
A triangular number or triangle number counts the objects that can form an equilateral triangle. 10 objects can be formed into an equilateral triangle.
32 is not a triangular number. The first few triangular numbers are 1, 3, 6, 10, 15, 21, 28, 36, 45, ...
28 is a triangular number because it is the sum of the integers 1 through 7. The next larger triangular number is 36, the sum of the integers 1 through 8. Therefore 26 is not a triangular number. Notice 28 = 7 times 8 divided by two and 36 = 8 times 9 divided by two. So what's the next triangular number??
The tenth triangular number is equal to (10 x 11) / 2 = 55.
Because it is ! The first 10 triangular numbers are... 1,3,6,10,15,21,28,36,45 & 55
no No it is not. The first 5 triangular numbers are: 1, 3, 6, 10, 15
It is 1+2+3+4 = 10.
yes it is!EDIT: No, it is not.