Explanation

Let's analyze the pattern:

25 - 1 = 24

24 - 2 = 22

22 - 3 = 19

19 - 4 = 15

15 - 5 = 10

Explanation

Explanation

The boy is the girl's brother.

The phrase "son of the daughter of the father of my uncle" refers to the girl's mother.

This making the boy her brother.

Explanation

To guarantee at least 2 black socks, consider the worst-case scenario where he draws all non-black socks first.

Total non-black socks = 42 (blue) + 15 (red) = 57

To guarantee 2 black socks, he needs to draw enough socks so that even if the first 57 are non-black, the next draws will include at least 2 black socks.

So, he draws 57 (non-black) + 2 (black) = 59 socks.

Explanation

Let's analyze the pattern:

Ali likes 25 (5^2), 400 (20^2), and 144 (12^2). He seems to like perfect squares.

From the options, 1600 is a perfect square (40^2).

Explanation

To calculate:

"Divided 30 by half" means 30 / 0.5 = 30 × 2 = 60

Now, add 10:

60 + 10 = 70

Explanation

If Ahsan was both 5th highest and 5th lowest:

There are 4 people who performed better than Ahsan.

There are 4 people who performed worse than Ahsan.

Total participants = 4 (better) + Ahsan + 4 (worse)

= 4 + 1 + 4

= 9

Explanation

The formula to find the number of handshakes between n people is:

Handshakes = 𝑛(𝑛−1)/2

Here, n = 10

10 × 9/2 = 45

So, 45 handshakes occurred before the meeting.

Explanation

Let's break it down:

2 typists can type 2 pages in 5 minutes, so:

2 typists can type 4 pages in 10 minutes.

To type 20 pages in 10 minutes, we'll need:

20 pages / 4 pages = 5 times more typists

Since 2 typists can type 4 pages, we'll need:

2 typists × 5 = 10 typists

Explanation

Let's try adding each option to the words:

BROW + N = BROWN

EAR + N = EARN

TOW + N = TOWN

All three words form new words when suffixed with "N".