Question

when I was 6 my sis age was half of me means 3 now I am 70 how old is she​

Answer 1

Explanation:

The ‘trick’ part of the question is that the ages are depicted as multiples of each other, which tricks the brain into thinking that some complex calculation is needed to solve the problem.

The ‘trick’ in solving this kind of problem is to not think abstractly about the problem, but rather try and make it relate to a practical situation (e.g. your life).

When you apply that to this example, you will immediately remember that time travels in a linear fashion - therefore the difference of ages at any given time will be the same. Thus,

6 - (6/2) = 70 - X

X = 70 - 6 + (6/2)

X = 67

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