Check sibling questions

Example 3 - Find the digits A and B - BA x B3 = 57A - Examples

Example 3 - Chapter 16 Class 8 Playing with Numbers - Part 2
Example 3 - Chapter 16 Class 8 Playing with Numbers - Part 3
Example 3 - Chapter 16 Class 8 Playing with Numbers - Part 4
Example 3 - Chapter 16 Class 8 Playing with Numbers - Part 5

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Transcript

Example 3 Find the digits A & B Here, A × 3 ends with A We put different values of A, and check which ends with A ∴ A can be 0, or 5 Checking for A = 0, B = 9 Putting values Since multiplication is not 570 ∴ A = 0 is not possible Checking for A = 0, B = 9 Putting values Since multiplication is not 570 ∴ A = 0 is not possible For A = 5 Calculating Multiplication Here, (3B + 1) + 5B ends with 7 i.e. 8B + 1 ends with 7 Checking different values of B ∴ B = 2 Checking for A = 5, B = 2 Putting values Hence verified ∴ A = 5 and B = 2

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.