Linear equations

Is there a temperature at which Celsius and Fahrenheit readings are the same?

The product of Mary's age at her last birthday and her age in complete months is 1800. How old is Mary?

Think of a number and follow my instructions. Tell me your answer, and I'll tell you what you started with! Can you explain how I know?

Granny has taken up deep-sea fishing! Last week, she caught a fish so big that she had to cut it into three pieces in order to weigh it...

If you know that a fraction of X is the same as a different fraction of Y, can you work out X/Y?

How many more miles must the car travel before the numbers on the milometer and the trip meter contain the same digits in the same order?

A, B & C own a half, a third and a sixth of a coin collection. Each grab some coins, return some, then share equally what they had put back, finishing with their own share. How rich are they?

Given an equilateral triangle inside an isosceles triangle, can you find a relationship between the angles?

A job needs three men but in fact six people do it. When it is finished they are all paid the same. How much was paid in total, and much does each man get if the money is shared as Fred suggests?

If: A + C = A; F x D = F; B - G = G; A + H = E; B / H = G; E - G = F and A-H represent the numbers from 0 to 7 Find the values of A, B, C, D, E, F and H.