Ithought of a number, divided it by 1 1 2 , then added 2 1 2 to the result, then multiplied the sum by 1 2 3 . then i subtracted 1 2 3 and got the result 2 5 6 . what was my number?

Step-by-step explanation:

Working backwards, the addition changes subtraction and division changes to multiplication and vice versa

The numbers are and

The result is  

Adding   to   we obtain

+ =

Dividing by we obtain

Subtracting from we obtain

Multiplying by we obtain

Therefore, the number is

10/60

step-by-step explanation:

if you divide 10 by 60 the answer is 0.166666 while if you divide or solve the other problems it equals 0.6

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.