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Question : 38 of 200
Marks:
+1,
-0
Solution:
34 – 30
⇒ (3 + 4) – (3 + 0)
⇒ 7 – 3 = 4
44 – 31
⇒ (4 + 4) – (3 + 1)
⇒ 8 – 4 = 4
61 – 22
⇒ (6 + 1) – (1 + 2)
⇒ 7 – 3 = 4
25 – 21
⇒ (2 + 5) – (2 + 1)
⇒ 7 – 3 = 4
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