# Aptitude [TCS Placement]: Sample Questions 7 - 8 of 174

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## Question 7

### Write in Short

Short Answer▾Ten years ago X was half of Y. If the ratio of their present ages is , what will be the total of their present ages?

### Explanation

- Let the present age of X is x years and Y is y years.
- Before 10 years, X was half of Y, i.e..

- Ratio of their present ages is , i.e..

- Solving both the equations,

x = 15 and y = 20

- We are asked to find the total of their present ages.
- It will be,
- Total of present ages of X and Y is 35 years.

## Question 8

### Write in Short

Short Answer▾If the word ‘ddosszm’ is changed to ‘central’ then what will be the change for ‘rtjbl’ ?

### Explanation

Here, ddosszm = central

d = c, i.e.. first letter is decremented by 1 position

d = e, i.e.. second letter is incremented by 1 position

o = n, i.e.. third letter is decremented by 1 position

s = t, i.e.. fourth letter is incremented by 1 position

s = r, i.e.. fifth letter is decremented by 1 position

z = a, i.e.. sixth letter is incremented by 1 position

m = l, i.e.. seventh letter is decremented by 1 position

We need to follow the same pattern for the given word ‘rtjbl’

r = decrementing 1 position = q

t = incrementing 1 position = u

j = decrementing 1 position = i

b = incrementing 1 position = c

l = decrementing 1 position = k

So, ‘rtjbl’ will be changed for ‘quick’ .