9801
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99*99=9801
what is the largest 4-digit number you can make
It is 9999 (if a one is added, it becomes a five digit number: 9999 + 1 = 10,000)
Well, let's see. Perfect cubes that are two digits: 27 64 Could it be 27? Well, 2+7 is 9, and that's a perfect square with a square root of 3, and the cube root of 27 is three. Looks like we've found our answer, especially since 6+4 = 10, which is NOT a perfect square.
what is the largest three-digit number that is divisible by 4, 5, and 6