Subject
Bank Exam
Topic
Bangladesh Krishi Bank 2017 (Sr. Officer)
If a two digit positive integer has its digits reversed the resulting integer differs from the original by By how much does the two digits differ?
If a two digit positive integer has its digits reversed the resulting integer differs from the original by By how much does the two digits differ?
ক)
3খ)
4গ)
5ঘ)
6Explanation
If we say that A = the tens digit {দশক স্থানীয় অঙ্ক } B = the units digit. {একক স্থানীয় অঙ্ক} then, original integer = 10A + B and original integer with digits reversed = 10B + A Now, we can use the fact that the difference between these two two-digit numbers is 27 to write the following equation: 10A + B - (10B + A) = 27 We have one equation and two variables. However, this is enough to answer the question, which asks for the difference between the two variables, A - B! 10A + B - (10B + A) = 27 10A + B - 10B - A = 27 9A - 9B = 27 9(A - B) = 27 A - B = 3Related questions
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