Question

Solve the riddle ❓❓❓❓

Answer 1

C÷4 = 3

So, C = 12

B×C = 84

B×12 = 84

B = 7

B+D = 18

7+D = 18

D = 11

But it says D ≠ 11

This riddle is challenging what we have learnt in mathematics so far.

The hint that says D ≠ 11 is not correct.

Answer 2

Answer:

Step-by-step explanation:

The value of D is 11

Step-by-step explanation:

Given,

A + B = 15 ..... (1)

B * C = 84 ..... (2)

C / 4 = 3 ..... (3)

B + D = 18 ..... (4)

From (3), we get

C = 3 * 4

or, C = 12

Putting C = 12 in (2), we get

B * 12 = 84

or, B = 84 / 12

or, B = 7

Now putting B = 7 in (4), we get

7 + D = 18

or, D = 18 - 7

or, D = 11

Therefore the value of D is 11.

Remark:

It can be considered that the fact which is mentioned in the question about D ≠ 11 is incorrect. Here we are getting the value of D as 11 itself; it cannot be 11 and not 11 at a time.

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