Practice Questions: Patterns | Science Olympiad for Class 5 PDF Download

Q1: Find the next number in the sequence: 2, 4, 8, 16, __?
Ans: 32

The pattern is doubling each number.
16 × 2 = 32

Q2: What comes next in the sequence: 5, 10, 15, 20, __?
Ans: 25

The pattern adds 5 to each number.
20 + 5 = 25

Q3: Find the next number in the pattern: 3, 9, 27, 81, __?
Ans: 243

The pattern multiplies each number by 3.
81 × 3 = 243

Q4: What is the missing number in the sequence: 1, 4, 9, 16, __?
Ans: 25

These are squares of consecutive numbers:
1² = 1, 2² = 4, 3² = 9, 4² = 16, 5² = 25

Q5: Find the next letter in the pattern: A, C, E, G, __?
Ans: I

The pattern skips one letter each time.
A, (B), C, (D), E, (F), G, (H), I

Q6: Find the next number in the sequence: 10, 20, 40, 80, __?
Ans: 160

The pattern doubles each number.
80 × 2 = 160

Q7: What comes next in the pattern: 12, 24, 36, 48, __?
Ans: 60

The pattern adds 12 to each number.
48 + 12 = 60

Q8: Find the next number in the sequence: 5, 15, 45, 135, __?
Ans: 405

The pattern multiplies each number by 3.
135 × 3 = 405

Q9: What comes next in the pattern: 1, 3, 7, 15, __?
Ans: 31

The difference between the numbers is increasing:
3 - 1 = 2, 7 - 3 = 4, 15 - 7 = 8.
The next difference is 16.
15 + 16 = 31

Q10: What is the next letter in the pattern: Z, X, V, T, __?
Ans: R

The pattern skips one letter going backward.
Z, (Y), X, (W), V, (U), T, (S), R

Q11: Find the missing number in the sequence: 6, 11, 16, 21, __?
Ans: 26

The pattern adds 5 to each number.
21 + 5 = 26

Q12: What comes next in the sequence: 100, 50, 25, 12.5, __?
Ans: 6.25

The pattern divides each number by 2.
12.5 ÷ 2 = 6.25

Q13: Find the next number in the sequence: 2, 6, 12, 20, __?
Ans: 30

The pattern adds consecutive even numbers:
2 + 4 = 6, 6 + 6 = 12, 12 + 8 = 20.
The next addition is 10.
20 + 10 = 30

Q14: What is the missing letter in the pattern: B, E, H, K, __?
Ans: N

The pattern skips two letters between each.
B, (C, D), E, (F, G), H, (I, J), K, (L, M), N

Q15: Find the next number in the pattern: 50, 45, 40, 35, __?
Ans: 30

The pattern subtracts 5 from each number.
35 - 5 = 30