What are the two consecutive numbers with a product of 240?

Answer 1

15, 16 or -16, -15

Let x be the first number & then x+1 will be the next number

so,

x*(x+1) = 240

x2+x-240 = 0

Now use the quadratic formula to find the roots: a=1, b=1, c=-240

Doing that the roots the equation are 15, -16

So the two consecutive numbers whose product is 240 is either 15 & 16 or

-16 & -15.