Can you use the digits 1 to 9 once, but only once, to replace the stars and complete the multiplicationÂ * *Â 9Â xÂ 4 *Â =Â * 6 * * ? (Hint: what is the largest 3 digit number you could use?)
(2) The next funny factorisation is 186 x ** = **** and again you must replace the * symbols so that the digits 1 to 9 each appear once and only once.
(3) The number 4396 can be written as a product in this way. Can you find the factors? (Hint: first find the prime factors of 4396.)
(4) Maths is full of surprises! The number 5796 can be written as a product like this in two DIFFERENT ways, and so can the number 5346. Can you find these four funny factorisations?
There are only seven possible funny factorisations?Â Can you find them all?