ReasoningAbility.com

Number Analogy - Intermediate Level: digital root INTERMEDIATE

Boost your speed and accuracy with this adaptive style 📈 worksheet. Worksheet 15 of 30 presents 20 intermediate-level number analogy problems. Focus on digital root while practicing numerical relationships, square-cube patterns, prime numbers. Difficulty: moderate complexity with mixed patterns. Perfect for mid-level test takers.

📝 Worksheet 15 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate level

What you'll learn in this worksheet:
Your progress through Number Analogy
Worksheet 15 of 30 (50% complete)

Question 1

Find the missing number: 5 : 10 (n=2) :: 2 : ?
The nth term formula: a + (n-1)d. For 2, term 2 = 7
progression, sequence

Question 2

Find the missing number: 24 : 8 :: 15 : ?
The relationship is dividing by 3. So 24 ÷ 3 = 8, and 15 ÷ 3 = 5
division, basic

Question 3

Find the missing number: 6 : 15 (n=4) :: 2 : ?
The nth term formula: a + (n-1)d. For 2, term 4 = 11
progression, sequence

Question 4

Find the missing number: 68 : 154 :: 54 : ?
The relationship is the sum of number and its reverse. 54 + 45 = 99
reverse, digits

Question 5

Find the missing number: 21 : 7 :: 21 : ?
The relationship is dividing by 3. So 21 ÷ 3 = 7, and 21 ÷ 3 = 7
division, basic

Question 6

Find the missing number: 11 : 7 :: 31 : ?
The relationship is the previous prime number. Previous prime before 31 is 29
prime, advanced

Question 7

Find the missing number: 18 : 9 :: 22 : ?
The relationship is dividing by 2. So 18 ÷ 2 = 9, and 22 ÷ 2 = 11
division, basic

Question 8

Find the missing number: 4 : 6 :: 8 : ?
The relationship is adding 2 (or double for some patterns). Here 8 + 4 = 12
addition, basic

Question 9

Find the missing number: 4 : 8 :: 9 : ?
The multiplier increases by 1: ×2 then ×3. So 9 × 3 = 27
multiplication, basic

Question 10

Find the missing number: 42 : 7 :: 60 : ?
The relationship is dividing by 6. So 42 ÷ 6 = 7, and 60 ÷ 6 = 10
division, basic

Question 11

Find the missing number: 4 : 64 :: 4 : ?
The relationship is cubing the number. So 4³ = 64, and 4³ = 64
square, power

Question 12

Find the missing number: 5 : 7 :: 23 : ?
The relationship is the next prime number. Next prime after 23 is 29
prime, advanced

Question 13

Find the missing number: 6 : 720 :: 6 : ?
The relationship is factorial. 6! = 720, 6! = 720
factorial, advanced

Question 14

Find the missing number: 3 : 12 :: 5 : ?
The relationship is double factorial. 2 × 3! = 12, 2 × 5! = 240
factorial, advanced

Question 15

Find the missing number: 29 : 21 :: 26 : ?
The subtractor alternates: -8 then -7. So 26 - 7 = 19
subtraction, basic

Question 16

Find the missing number: 2 : sum of 2 terms = 8 :: 2 : sum of 2 terms = ?
Sum of 2 terms of AP: n/2 × (2a + (n-1)d). For 2, sum = 8
progression, sequence

Question 17

Find the missing number: 4 : 8 :: 2 : ?
The relationship is multiplying by 2. So 4 × 2 = 8, and 2 × 2 = 4
multiplication, basic

Question 18

Find the missing number: 7 : 28 :: 4 : ?
The multiplier increases by 1: ×4 then ×5. So 4 × 5 = 20
multiplication, basic

Question 19

Find the missing number: 2 : 8 :: 2 : ?
The relationship is cubing the number. So 2³ = 8, and 2³ = 8
square, power

Question 20

Find the missing number: 27 : 45 :: 73 : ?
The relationship is the difference between number and its reverse. |73 - 37| = 36
reverse, digits
Previous Worksheet Next Worksheet