Problema Solution
What is the two-digit mystery number?
It is between 40 and 50.
The ones digit is less than the ten digit.
The sum of the digits is not 6.
The mystery number is not 43.
What is the mystery number?
Explain how you know?
Answer provided by our tutors
All numbers between 40 and 50 are
41, 42, 43, 44, 45, 46, 47, 48, 49
One digit is less than ten digit this leaves only
41, 42, 43
The sum of the digits is not 6, this leaves
41, 43
The mystery number is not 43
=> the number is 41