Q: Which is the smallest number that can be expressed as the sum of six different square numbers but can't be expressed as the sum of five different square numbers?

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1729, the smallest number that can be expressed as a sum of a pair of cubes in two different ways.

6666

There is no difference. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

15

1729 is the smallest natural number that can be expressed as a sum of two cubes of positive number in two different ways: 1729 = 13 + 123 = 93 + 103 It is known as the Ramanujan-Hardy number. But is also known as a Taxicab number which are numbers that can be expressed as sums ot 2 cubes in 2, 3, 4, etc different ways.

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94 - 1^2 + 2^2 ... 6^2.

1729, the smallest number that can be expressed as a sum of a pair of cubes in two different ways.

Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

30

6666

There is no difference. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.

1,023.

Here it is ! 10,234 !!

15

1729 is the smallest natural number that can be expressed as a sum of two cubes of positive number in two different ways: 1729 = 13 + 123 = 93 + 103 It is known as the Ramanujan-Hardy number. But is also known as a Taxicab number which are numbers that can be expressed as sums ot 2 cubes in 2, 3, 4, etc different ways.

2 222 223

1+2=3