Question

What is the missing number in the sequence?

1) 20
2) 25
3) 40
4) 55
5) 60

Answer 1

The missing number in the sequence 20, 25, 40, 55, 60 can be found by continuing the pattern of alternating between adding 5 and 15.

Step-by-step explanation:

To determine the missing number in the sequence (20, 25, 40, 55, 60), we should look for a pattern. Here's a possible pattern: Add 5 to the first number to get the second number (20 + 5 = 25), then add 15 to get the third number (25 + 15 = 40). If this pattern of alternating between adding 5 and adding 15 continues, the sequence after 55 should add 5 to get the next number. Therefore, after 55, if we add 5, we get 60. This sequence suggests the numbers are increasing by alternating increments of 5 and 15.