Question

Which group doesn't match the pattern?

• A. 20,30,50
• B. 15,25,40
• C. 18,24,36
• D. 14,28,56

Answer 1

Answer:

B. 15,25,40

Let's inspect the groups:

• 20, 30, 50 → All are multiples of 10.

• 18, 24, 36 → All are multiples of 6.

• 14, 28, 56 → Each number is obtained by doubling the previous one (×2, ×2), and all are multiples of 14.

• 15, 25, 40 → Although 15 + 25 = 40, the numbers are not all multiples of the same base, nor do they form a consistent multiplicative pattern like the others.

Another way to see it:

• 20 : 30 = 2 : 3

• 18 : 24 = 3 : 4

• 14 : 28 = 1 : 2

• 15 : 25 = 3 : 5 (doesn't fit the progression)