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Well, darling, 1 multiplied by 2 is 2, then 2 multiplied by 3 is 6, then 6 multiplied by 4 is 24, then 24 multiplied by 5 is 120, then 120 multiplied by 6 is 720, then 720 multiplied by 7 is 5040, then 5040 multiplied by 8 is 40,320, then 40,320 multiplied by 9 is 362,880, and finally, 362,880 multiplied by 10 is 3,628,800. Voilà!
10! (read ten factorial)
Applying the binomal theorem, multiply all the digits.1x2x3x4x5x6x7x8x9x10.You probably need to practise arithmetic more than I do.
To solve 1x2x3x4x5x6x7x8x9x10 easily, you can simply multiply all the numbers together. This can be done by first multiplying 1 and 2 to get 2, then multiplying that result by 3 to get 6, and so on until you reach 10. The final result of multiplying 1 through 10 together is 3,628,800.
Taken individually, 1, 2, 3, 5 and 7 don't have prime factorizations. That leaves2 x 2 = 42 x 3 = 62 x 2 x 2 = 83 x 3 = 92 x 5 = 10Collectively, 28 x 34 x 52 x 7 = 3,628,800