Question

18, 20, 24, _ , 77?

Answer 1

Correct Answer: 5.5

The given sequence is: 18, 20, 24, _, 77. We need to determine the missing number. Let's examine the differences between the numbers:

• 20 - 18 = 2
• 24 - 20 = 4

The differences are increasing by 2 each time. Continuing this pattern:

• Next difference: 4 + 2 = 6

Add this difference to the last known number:

• 24 + 6 = 30

The sequence is thus: 18, 20, 24, 30, 77.

Checking if the calculated number (30) is within the provided range of 5.5, 5.5 is unnecessary since these appear to be misinterpreted as a range, and the calculated value is consistent with the sequence logic. The correct missing number is 30, and the sequence maintains its logical progression.