Harry __multiplied__ two numbers together. His answer was 120. Which two numbers could he have __multiplied__ together?

- An infinite number of correct answers
- From a SATS key stage 2 (i.e. for 6-7 year olds) practice question...

- An infinite number of correct answers
- From a SATS key stage 2 (i.e. for 6-7 year olds) practice question...
__multiplied__two numbers together. His answer was 120. Which two numbers could he have__multiplied__together?

valkyriekarenlovingbothbaraktaI specifically said I was only dealing in integers.

That's also quite hard for a KS2 child - they only really seem to have started multiplication tables by then. I'm not sure I could have done that at 6 or 7 cos we didn't do tables properly till I was about 8 when I crunched through them rapidly and got my stupid certificate out of the way.

ciphergothbaraktaciphergothvalkyriekarenciphergothvalkyriekarenneedto know why. Multiplying minus numbers in my head isn't something I need to do regularly, anyway.lovingbothI was expecting Paul to say something like '120 pi and 1 / pi' :)

baraktaI definitely want to see what the mathmos answered and see if my poor little brain can make sense of it without going *boom*.

ciphergotha_musing_amazonWhile (-1,-120),(-2,-60),(-3,-40),(-4,-30),(-5,

also (x,120/x) where x is a rational number,

also irrational solutions such as (120^1/2,120^1/2),

also transcendental numbers such as (Pi, 120/Pi),(e,120/e).

also complex numbers, such as (120i, -i).

I suppose the most general answer would be something like (x, 120/x) where x is a complex number a +bi where a and b are real numbers and a+bi <> 0. But this does seem a bot beyond the comprehension of most 5-6 yeat olds.

nitodatrishpigletBut then I'm not 6

haggisergotiabadriyalovingbothI'm not sure they do 10x as a formal table, but yes, it's an early one although there are some children in te age range who won't have done much wth numbers greater than a 100 yet.