Question

Find the missing number:
0.5, 2, (4)5, 8, 1(2)5, .........

• A. 16
• B. 18
• C. 17
• D. 19

Hint:

When solving number series problems, identify the pattern in the differences between the terms. If the differences follow a consistent pattern, continue the pattern to find the missing number.

Answer 1

The Correct Option is B

Let’s analyze the pattern in the given numbers:
- From 0.5 to 2, the increment is 1.5.
- From 2 to 4.5, the increment is 2.5.
- From 4.5 to 8, the increment is 3.5.
- From 8 to 12.5, the increment is 4.5.
The pattern for the increments is increasing by 1 each time (1.5, 2.5, 3.5, 4.5...).
So, the next increment should be 5.5:
\[ 12.5 + 5.5 = 18 \] Thus, the missing number is \( 18 \). Therefore, the correct answer is \( \boxed{18} \).