Given interchanges : Signs + and - , numbers 4 and 8.

Mental Ability - Questions

8 - 4 + 12 = 8

4 - 8 + 12 = 0

4 + 8 - 12 = 12

8 + 4 - 12 = 24

Correct Answer : Option (B) - 4 - 8 + 12 = 0

Explanation :

On interchanging + and - and 4 and 8 in (b),

we get the equation as

8 + 4 - 12 = 0

or 12 - 12 = 0

or 0 = 0, which is true.

Recently Updated in Mental Ability Questions

Q .

In the following question :

Various terms of an alphanumerical series are given with one or more terms missing as shown by (?).

Choose the missing terms out of the given alternatives. BMO, EOQ, HQS, ?

SOV

LMN

KSU

SOW

Correct Answer : KSU

Explanation : The first letter moves 3 steps forward. The second and third letters move 2 steps forward.

Q .

What should come in place of the question mark (?) in the following number series? 8, 6, 9, 23, ?

Correct Answer : 87

Explanation :

Given number 8, 6, 9, 23, ?

The pattern of given series is :

8 x 1 - 2 = 6 6 x 2 - 3 = 9 9 x3 - 4 = 23 23 x4 - 5 = 87