domingo, 11 de diciembre de 2016

Unit 6: Simultaneous equations

Unit 6: Simultaneous equations


Problem of the week: Christmas Tree


Answer to the problem of the week: Guessing your age

GUESSING YOUR AGE
· Think of a number from 1 to 9.
· Multiply this number by 2.
· Add 5.
· Multiply the result by 50.
· If you have already celebrated your birthday this year, add 1766.
· If you haven’t celebrated your birthday this year, add 1765.
· Finally, subtract the year you was born.
The result is a three-digit number:
- The first digit is the number you thought of.
- The two following numbers are YOUR AGE!!!!
Using algebraic language, explain why this happens.