Place Value Puzzles

Question

Double 12. Divide the result by 8. Write the answer in the thousands place. If you multiply the digit in the hundredths place by 10, your answer will be 40. The tens-place digit is a prime number. If you multiply it by itself, the answer is 49. Multiply 7 and 3. Subtract 12. Write the answer in the thousandths place. Multiply the digit in the hundredths place by the digit in the thousands place. Subtract 7 from the result. Write the digit in the tenths place. The digit in the ones place is an odd digit that has not been used yet. The value of the digit in the hundreds place is the same as the number of sides of a quadrilateral...What is the number????

Answer 1

The number is 3471.549.

To get this, write the number as abcd.efg where the digits a-g are found in the given clues.

a=2×12/8=3,

f=40/10=4,

c²=49, c=7,

g=3×7-12=9,

e=af-7=3×4-7=5,

d=1,

b=4.