# a synonymous phrase for 'to increase tenfold'

I know that we can say the following in the context of math:

We increase a number by a factor of ten.

We increase a number tenfold

Remind me please of what else we can say in this context?

Can we say that

we increase a number ten times, or

a number was increased ten times, or

a number became ten times more/ten times greater, or

a number became ten times as much ?

• multiply a number by 10 – user6951 Nov 16 '14 at 19:30
• @ CarSmack thanks. What about my examples in which I use the word 'times'. Is it acceptable in English? To be more precise, I want to mention the number multiplied by 't', where t is a number in a certain set. – user11470 Nov 16 '14 at 19:38
• You might also use "increase by 900%". – CowperKettle Nov 16 '14 at 19:46
• @ CopperKettle in no event! If I use "increase by", then there will be another meaning. – user11470 Nov 16 '14 at 19:51
• In your 2nd box, the first and second options don't necessarily imply a 10-fold increase. For instance, the value of the increase could have been 1 or some other number (like an iteration). – mkennedy Nov 16 '14 at 19:51

Can we say that

we increase a number ten times

No, because you cannot assume that each "increase" is the original number.

a number was increased ten times

for the same reason.

a number became ten times more/ten times greater

maybe but far too many words.

a number became ten times as much

OK. But for the last two examples, became is not a word generally used in the description of math equations.