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How do you write fifteen thousand in numbers?
15,000. Thousands have three zeros at the end, so you would simply add three zeros to fifteen for 15,000.
How many three-digit counting numbers are not multiples of 5?
There are 720 of them.
How many three-digit counting numbers are not multiples of 2?
The 3-digit counting numbers are 100 through 999 = 900 numbers.Half them are multiples of 2 (even numbers).The other half are not . . . 450 of them.
What does triangular number mean?
Triangluar numbers or triangle numbers are numbers formed from the summation of all the numbers smaller than them. The first few triangle numbers are 1,3,6,10,15,21... If you think of a pyramid with a base of two blocks, and one on top, there are three blocks. If you add a base of three to that pyramid, you have six blocks. Then ten, and fifteen and so on. That is why they are called Triangle numbers.
Three fourths of a certain number is 15 more than one fourth of a number what are the numbers?
Fifteen is three-fourths of what number?
