Question (ii) - Digits in Disguise - Chapter 5 Class 8 - Number Play (Ganita Prakash)

Transcript

Question (ii) – Page 131 Step 1 - Checking unit digit 𝐵+7 ends in 𝐴. Step 2 - Checking Ten’s Digit 𝐴+3 equals 6 . This suggests 𝐴 is probably 2 or 3 . Trial 1 – If A = 3: If 𝐴=3, then 𝟑𝑩+𝟑𝟕=𝟔𝟑 3B=63−37 𝟑𝐁=𝟐𝟔 First digit don’t match, as 3 ≠ 2 So, it is not possible Trial 2 – If A = 2: If 𝐴=2, then 𝟐𝑩+𝟑𝟕=𝟔𝟐 2B=62−37 𝟐𝐁=𝟐𝟓 So, B = 5 Check: 25+37=62 This is true Thus, 𝐀=𝟐," " 𝐁=𝟓