Explanation

Total of 3 ages = 17 + 16 + 12 = 45

New average = 20, for 4 people → Total = 20 × 4 = 80

Age of 4th person = 80 − 45 = 35

Explanation

This idiom describes someone who is full of energy, happiness, and enthusiasm.

It often refers to a cheerful mood like that of springtime.

Explanation

Explanation

Turkey has played a mediator role during tensions between Russia and the USA, especially during the Ukraine conflict.

It hosted talks and negotiations on security and humanitarian issues.

Explanation

To find the number of hours 10 men will take:

First, find the total work hours for 6 men:

6 men * 15 hours = 90 man-hours

Now, divide the total work hours by 10 men:

90 man-hours / 10 men = 9 hours

Explanation

The sentence implies she shares helpful or thoughtful advice, which fits best with "kind word of advice."

Kind means قسم

Explanation

Explanation

The border conflict between Ethiopia and Somalia centers around the Ogaden region, which Somalia claims as part of Greater Somalia.

This issue has led to wars and ongoing tensions in the Horn of Africa.

Explanation

Given x + 1/x = 5

To find x² + 1/x²:

(x + 1/x)² = x² + 2(x)(1/x) + 1/x²

= x² + 2 + 1/x²

x² + 1/x² = (x + 1/x)² - 2

= 5² - 2

= 25 - 2

= 23

Explanation

Given:

a : b : c = 2 : 5 (let's assume a common multiple for b and c to match both ratios)

b : c = 3 : 7

To match both ratios, let's find the LCM for b in both ratios.

Given a : b = 2 : 5 and b : c = 3 : 7, let's make the ratios comparable by finding a common multiple for b.

For a : b = 2 : 5 and b : c = 3 : 7,

let's scale a : b : c = 2_3 : 5_3 : 5*7 = 6 : 15 : 35

Now b : c = 15 : 35 which simplifies to 3 : 7.

Given a : b : c = 6 : 15 : 35

a : c = 6 : 35