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Q: What are all the numbers that give 7.29 when squared?

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All Factors of 729:1, 3, 9, 27, 81, 243, 729

729 = 3x3x3x3x3x3 so 3, 9, 27, 81, and 243 will all divide into 729 evenly.

When you square a number, the final digit is the final digit of the 'one's' number squared. Since the only single digit numbers squared which ends in 6 are 4 and 6, the answer is either 4 or 6 (a calculator tells me it is 6) 0 squared is 0. All numbers ending in 0 when squared will end in 0. 1 squared is 1. All numbers ending in 1 when squared will also end in 1. 2 squared is 4. All numbers ending in 2 when squared will end in 4. 3 squared is 9. All numbers ending in 3 when squared will end in 9. 4 squared is 16. All numbers ending in 4 when squared will end in 6. 5 squared is 25. All numbers ending in 5 when squared will end in 5. 6 squared is 36. All numbers ending in 6 when squared will end in 6. 7 squared is 49. All numbers ending in 7 when squared will end in 9. 8 squared is 64. All numbers ending in 8 when squared will end in 4. 9 squared is 81. All numbers ending in 9 when squared will end in 1. So square numbers can only end with 0, 1, 4, 5, 6 or 9.

They are all composite and rational numbers

243, 81, 9, 3

1,4,9,16,25,36,49,64,81,100,121,144,169,196,225

There are an infinity of numbers and each one has its square...

It is impossible to list all squared prime numbers as there is an infinite number of squared prime numbers starting with 4, 9, 25, 49, 121, 169, 289, 361, 529, 841,...

Yes. Except for square of 1.

Yes.

(-1)2=1 all squared numbers turn out positive and 12=1 (-1)2=1 all squared numbers turn out positive and 12=1

all the 300's , so that leaves 900 numbers of those 900 all the 30's, so that leaves 810 numbers of those all the 3's, so that leaves 729 numbers don't there are 998 numbers between 1 and 1000, so 998 - 729 = 269 (271 if 1 & 1,000 are inclusive)

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