If 6 A × B = A 8 B, then the value of A - B is
(a) -2
(b) 2
(c) -3
(d) 3

Solution:

6 A
× B
A 8 B

A × B = B

1 × 3 = 3

6 × 3 = 18

Hence

A = 1 and B = 3

A - B = -2

The correct answer is (a)

✦ Try This: If 7 A × B = A 6 B, then the value of A - B is (a) -2, (b) 2, (c) -3, (d) 3

7 A

× B

A 6 B

A × B = B

3 × 5 = 15 (one carry over)

(5 × 7) + 1 = 36

Hence

73 × 5 = 365

A = 3 and B = 5

A - B = -2

Correct choice is (a).

☛ Also Check: NCERT Solutions for Class 8 Maths Chapter 16

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NCERT Exemplar Class 8 Maths Chapter 13 Problem 16

If 6 A × B = A 8 B, then the value of A - B is (a) -2, (b) 2, (c) -3, (d) 3

Summary:

If 6 A × B = A 8 B, then the value of A - B is -2

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