Question

41:15:42:?
Select one:
a. 20
b. 12
C. 51
a: 18​

Answer 1

Answer:

I am considering this as the question of Mental Ability and not of Maths.

For the first part 41:15

Here, 4+1 = 5 and 3 (5) = 15

So, the logic is 3×(sum of digits) = result

Thus, answer = 3(4+2) = 3(6) = 18

Hence, answer is 18

Answer 2

Answer:

Required ? is 12.

So, option b is the correct answer.

Step-by-step explanation:

Given,$41:15:42:?$

This is a problem of General inteligence part of Mathematics.

If you look it carefully then you can see that the given terms maintain a sequence.

For first two digits,$41:15$

Now question is how can we get 15 from 41 ?

41 made by 4 and 1.

Here,

$(4 - 1) \times (4 + 1) \\ = 3 \times 5 \\ = 15$

This is the relation between 41 and 15.

Similarly,

42 made by 4 and 2.

So,

$(4 - 2) \times (4 + 2) \\ = 2 \times 6 \\ = 12$

Therefore required number is 12.

Some more extra information:

Some important Mathematics formulas.

(a + b)² = a² + 2ab + b²

(a − b)² = a² − 2ab − b²

(a + b)³ = a³ + 3a²b + 3ab² + b³

(a - b)³ = a³ - 3a²b + 3ab² - b³

a³ + b³ = (a + b)³ − 3ab(a + b)

a³ - b³ = (a -b)³ + 3ab(a - b)

a² − b² = (a + b)(a − b)

a² + b² = (a + b)² − 2ab

a² + b² = (a − b)² + 2ab

a³ − b³ = (a − b)(a² + ab + b²)

a³ + b³ = (a + b)(a² − ab + b²)

Two more important Mathematics,

1) https://brainly.in/question/13024124

2) https://brainly.in/question/1169549