1, starting from the second condition, the multiple of 5 is characterized as 0 or 5 at the end, and the remaining two grains are added with 2, so the final position of the number of grains of sugar may be 2 or 7; Let's look at the first condition. Seven is more than four, minus four. After the number of grains of sugar is reduced by four, the last digit will become 8 or 3, and the minimum multiples of 7 with 8 or 3 at the end are 28 and 63. Look at 28 first, it is 32 plus 4, but 32 is not a multiple of 3. Add up to only the common multiple of 5 and 7. The minimum is 35, 32 plus 35 equals 67, not a multiple of 3. Adding 35 equals 102, which meets the requirements.

2. List two equations according to the conditions: 5 buttercups and 4 fruit candies are equal to 44 yuan; The price of toffee plus 1 fruitcake is equal to the price of 3 fruitcakes plus 1 toffee.

Simplified Equation 2 According to the properties of the equation, it is concluded that the price of three toffee is equal to the price of two fruitcakes, the price of 1 toffee is equal to the price of two-thirds fruitcakes, 5x2/3 is equal to 10/3 box, 4 plus 10/3 is equal to 22/3 box, and 44 divided by 22/3 is equal to 6 yuan.

3. Suppose that C is the same as A, the sum of three numbers is 360 minus 5 equals 355, 355 divided by (1 plus 2 plus 2) equals 7 1, B is 7 1, A is 7 1x2 equals 142. C is 142 plus 5 equals 147.