Find the missing number in the series: 5, 10, 20, 40, ?

C. 80

If '+' represents addition, '-' represents subtraction, '×' represents multiplication, and '÷' represents division, what is the value of 8 ÷ 2 + 3 × 4?

B. 20

In the sequence 0, 1, 2, 3, 4, 5, how many times does the number 3 occur?

B. 1

Find the odd one out in the series: A, C, E, G, H, I, K

C. H

Which of the following words can be formed by rearranging the letters of 'LISTEN'?

A. SILENT