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The sum of the first x odd numbers is equal to x2 (for integers only.)
For example, take 72: We'll take the first seven odd numbers:
1 + 3 + 5 + 7 + 9 + 11 + 13
= 4 + 12 + 20 + 13
= 16 + 33
= 49
This then, can be expressed as follows:
x
x2 = Σ(2n - 1)
n=1
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Which is the only number which is equal to the sum of its digits?
Well, 1 is equal to 1. 9 is equal to 9. So any number from 0 to 9. I do not think this is what is meant by the question. If you mean any number with more than one digit. There is no such number. Because 11 sums to 2. 19 sums to 10. 21 sums to 3. 29 sums to 11. 111 sums 3. 119 sums to 11. The sums do not grow as fast the increase of digits.
Are 2x2x2x2x2 and 5x5 equal?
2x2=4 x2=8 x2=16 x2 = 32 and 5x5 = 25 so no, I guess not.
What is a number sentence stating that 2 amounts are equal?
x = x, y=y, x2=x2
What number multiplied by itself is equal to the product of 6 and 150?
x2=6*150 x2=900 x=30
What does 2x2 minus x2 equal?
2x2=4 X -2=-8
What does x2 - x2 equal to?
0
Which is the only number which is equal to the sum of its digits?
Well, 1 is equal to 1. 9 is equal to 9. So any number from 0 to 9. I do not think this is what is meant by the question. If you mean any number with more than one digit. There is no such number. Because 11 sums to 2. 19 sums to 10. 21 sums to 3. 29 sums to 11. 111 sums 3. 119 sums to 11. The sums do not grow as fast the increase of digits.
What sums can equal 56?
7X8=56
What do the sums of all quads equal?
360
Without adding, find which sum is greater.A+HNeither; the sums are equalE+C?
Neither; the sums are equal.
What does x2 plus 6-40 equal?
It equals x2 - 34
What is 2x squared plus x2 equal?
2x2 + x2 = 3x2
What does the right triangles exterior sums have to equal?
900
How many sums equal 25?
An infinite number.
Is x2 equal to 2x?
Only if x is equal to 2.
Can the sums of two mixed numbers be equal to two?
Yes
What is in brackets12 x 6 end bracket x2 equal?
(12x6)x2 = 12x8
