Explanation

 Plastic (It is not a natural mineral or metal)

Explanation

1 ÷ 25 = 0.04  

0.04 × 100 = 4 

Explanation

Given: 3x = 12  

To find x, divide both sides by 3:  

x = 12 ÷ 3  

x = 4  

Explanation

Work is inversely proportional to workers: 6×8 = 4×x → x = 12

Explanation

The rearranged word "APJAN" forms the name of a country — Japan. 

Explanation

If yesterday was Sunday, then today is Monday.

- Tomorrow → Tuesday  

- Day after tomorrow → Wednesday

Explanation

Let Anwar's current age = x  

Then Ali's current age = 2x  

After 6 years:  

Ali's age = 2x + 6  

Anwar's age = x + 6  

According to question:  

(2x + 6)/(x + 6) = 23/13  

Cross-multiplied:  

13(2x + 6) = 23(x + 6)  

26x + 78 = 23x + 138  

26x - 23x = 138 - 78  

3x = 60  

x = 20  

Ali’s age = 2x = 40 years

Explanation

- First term: 9P0145 → removing 'P' gives 90145  

- Second term: 90159 → 90145 + 14 = 90159  

- Next: 90159 + 14 = 90173

Explanation

Using the concept of work and rate, we can analyze the given information:

A+B = 1/18 (work done per day)

A+C = 1/12

B+C = 1/9

By adding the first two equations, we get:

(A+B) + (A+C) = 1/18 + 1/12

2A + (B+C) = 1/6

2A + 1/9 = 1/6

2A = 1/6 - 1/9

2A = 1/18

A = 1/36 (work done by A per day)

Now, we can find B's work per day:

B = 1/18 - 1/36 = 1/24

So, B alone can do the work in 24 days.

Explanation

Step 1: Multiply the number of students in each class by their pass percentage

- Class 1: 10 students × 20% = 2 passed  

- Class 2: 20 students × 30% = 6 passed  

- Class 3: 30 students × 60% = 18 passed  

- Class 4: 40 students × 100% = 40 passed  

Step 2: Add total passed students and total students

- Total passed = 2 + 6 + 18 + 40 = 66  

- Total students = 10 + 20 + 30 + 40 = 100

Step 3: Calculate the overall percentage

Pass % = (66 / 100) × 100 = 66%