I can think of two ways but I dont think its technically right..turn the 9 upside down to get a six..then its 6+9+15=30 or if you used a factoral it could be 11+3!+13=30
Well, this can't be solved without a trick.. the question states that you use the following "(1,3,5,7,9,11,13,15)" this includes (), and a comma. If you read it like that the math gets a lot easier. Ex 11,7 + 15,3 + 3 = 30. Or you can use factoral like geekoverlord wrote.
Yes, however this was held in India (as it says in the bottom). They don't use commas to distinguish from decimal and not, they use a full stop like the US. So instead of 11,7, in India you would write 11.7, but there is no dot found within the brackets, or anywhere on the page.
https://en.wikipedia.org/wiki/Decimal_mark#Hindu.E2.80.93Arabic_numeral_system
If you write it as [(7(] + [3))] + [9] (with brackets signifying the boxes) you're right though. That translates to (7(+3))+9, which is 7 times positive 3 (21), plus 9 (30). It gives you the multiplication using only the symbols provided.
deleted
· 6 years ago
Oh.
Well thanks, I've been trying to just put a single 3 in a parenthesis [(3)]
The answer lies not in the problem, but the way the problem has been forumlated. The answer is 15 + 15 + blank box = 30. Remember the QUESTION says fill in the boxes. It DOES NOT SAY that you CANNOT leave a box blank. This is more to check your level of INTERPRETATION rather than actual mathematical skill. Your powers of OBSERVATION are what matters not the mathematical impossibility of 3 odd numbers resulting in an even sum.
These kind of brain teasers piss me off because there's no logical solution. It's looking for a loophole in the grammar or the ability to parse the question in different ways which is closer to cheating than solving.
https://en.wikipedia.org/wiki/Decimal_mark#Hindu.E2.80.93Arabic_numeral_system
(little bitch)
Well thanks, I've been trying to just put a single 3 in a parenthesis [(3)]
[15]+[15]+[,]=30
does that make any sense