Explanation

 Pattern is ×2 + 1 → (4×2+1 = 9),

(9×2+1 = 19),

(19×2+1 = 39),

(39×2+1 = 79)

Explanation

The result of 15 × 6 ÷ 2 is:

15 × 6 = 90  

90 ÷ 2 = 45  

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