Question

If 5 x 7 = 8 and 9 x 6 = 9, then 12 x 5 =
(A) 8 (B) 14
(C) 12 (D) 6

Answer 1

Answer:

6

Step-by-step explanation:

Given,

• 5 × 7 = 8
• 9 × 6 = 9
• 12 × 5 = ?

Trick followed :-

• a × b = C and C is given by the sum of the digits when you multiply a and b
• 1) Ex:- 5 × 7 = 35
• Sum of digits in the product is (3+5 = 8)
• Therefore 5 × 7 = 8
• 2) Ex :- 9 × 6 = 54
• Sum of digits in the product is (5+4 = 9)

Solution:-

• Required the value of 12×5
• 12 × 5 = 60
• Sum of the digits = (6+0 = 6)
• Therefore, value of 12×5 = 6 according to the question