9 + 9 ÷ √9... Applying the "BODMAS 'rule' ": 9 + 9 ÷ √9 = 9 + (9 ÷ √9) = 9 + (9 ÷ 3) = 9 + 3 = 12 You would 'get' 6 when: (9 + 9) ÷ √9 = (18) ÷ 3 = 6 9 + 9 ÷ √9 = 9 + (9 ÷ √9) 9 + 9 ÷ √9 ≠ (9 + 9) ÷ √9 (I think it's just you...)
BODMAS is an acronym... Mathematical sums should be 'worked-out' in the following sequence: Brackets (what appears within brackets) first, followed by the Order of: DIVISION(s) MULTIPLICATION(s) ADDITION(s) SUBTRACTION(s)
If you write square root of 9, the only answer is 3, but if you write X^2 = 9, then X can be either -3 or 3.
It must be able to work in both directions or otherwise one will contradict the other and invalidate the equation.
very mathematical but i love the 9 clock too. 9 is my favourite number by the way. to try and answer oldhand, i think number 7 is a round up number. you see 9 minus the root of nine (in this case 3) yields a 6. and add 0.9 to 6 you will get 6.9 which when we round up to the nearest whole number will give us 7. could this be a logical answer to the number 7 equation? what i dont get is number 5. my maths is weak care to explain this one to me?
5 is: √9 = 3 can only be a positive value as there is no factorial of negatives) 3! = 3 x 2 x 1 = 6 Factorial is n! = n! x (n-1) x (n-2) x ... x 1 6 - 9/9 = 6 - 1 = 5