how do you know that 77 is not a square number? same question different wording
2007-09-21 10:51:51 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Because you can't take 2 of the SAME number and divide it evenly. Example 8 times 8 = 64. or 6 times 6 = 36.
2007-09-21 10:59:28 · answer #1 · answered by white tiger 3 · 0⤊ 0⤋
77 is an odd number of the form 8k+5.
But the square of any odd number is always
of the form 8k+1, so 77 cannot be a square.
2007-09-21 18:24:28 · answer #2 · answered by steiner1745 7 · 1⤊ 0⤋
8*8 = 64
9*9 = 81
64 < 77 < 81 // Take square roots
sqrt(64) < sqrt(77) < sqrt(81)
8 < sqrt(77) < 9
There is no natural number n such that
8 < n < 9
2007-09-21 18:01:35 · answer #3 · answered by Amit Y 5 · 1⤊ 0⤋
find the square. if it doesn't have a decimal, it's a square number. 77's square root is 8.774964387
so. it's not a square number.
you should remember the square numbers so you wouldn't have questions like this (in class, that is.)
2007-09-21 18:49:04 · answer #4 · answered by anne 2 · 0⤊ 0⤋
Because you can not multiply two of the same numbers to equal it.
2007-09-21 18:03:56 · answer #5 · answered by Anonymous · 0⤊ 0⤋