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Number Analogy - Intermediate-Advanced Level: digit manipulation INTERMEDIATE-ADVANCED

Strategic expert challenge ★ for number analogy: 20 intermediate-advanced-level problems. Worksheet 19 of 30 - Focus: digit manipulation. Develop expertise in digit manipulation, number squares, cubic relations with step-by-step solutions. Ideal for advanced developing learners targeting advanced concepts with increasing complexity.

📝 Worksheet 19 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate-advanced level

What you'll learn in this worksheet:
Your progress through Number Analogy
Worksheet 19 of 30 (63% complete)

Question 1

Find the missing number: 3 : 9 :: 3 : ?
The relationship is square root. √3 = 9
square, roots

Question 2

Find the missing number: 89 : 98 :: 19 : ?
The relationship is reversing the digits. Reverse of 89 is 98, reverse of 19 is 91
reverse, digits

Question 3

Find the missing number: 37 : 41 :: 5 : ?
The relationship is the next prime number. Next prime after 5 is 7
prime, advanced

Question 4

Find the missing number: 41 : 37 :: 11 : ?
The relationship is the previous prime number. Previous prime before 11 is 7
prime, advanced

Question 5

Find the missing number: 82 : 16 :: 24 : ?
The relationship is the product of digits. Product of digits of 82 = 16, product of digits of 24 = 8
product, digits

Question 6

Find the missing number: 1 : sum of 3 terms = 15 :: 1 : sum of 3 terms = ?
Sum of 3 terms of AP: n/2 × (2a + (n-1)d). For 1, sum = 15
progression, sequence

Question 7

Find the missing number: 31 : 25 :: 21 : ?
The subtractor alternates: -6 then -5. So 21 - 5 = 16
subtraction, basic

Question 8

Find the missing number: 14 : 7 :: 6 : ?
The inverse relationship: multiply by 2. So 6 × 2 = 12
division, basic

Question 9

Find the missing number: 21 : 17 :: 26 : ?
The subtractor alternates: -4 then -3. So 26 - 3 = 23
subtraction, basic

Question 10

Find the missing number: 11 : 22 :: 6 : ?
The relationship is multiplying by 2. So 11 × 2 = 22, and 6 × 2 = 12
multiplication, basic

Question 11

Find the missing number: 11 : 55 :: 7 : ?
The relationship is multiplying by 5. So 11 × 5 = 55, and 7 × 5 = 35
multiplication, basic

Question 12

Find the missing number: 2, 2, 4 : 8 :: 1, 3, 4 : ?
Tribonacci pattern: each term is sum of previous three. 1+3+4 = 8
pattern, sequence

Question 13

Find the missing number: 35 : 7 :: 6 : ?
The inverse relationship: multiply by 5. So 6 × 5 = 30
division, basic

Question 14

Find the missing number: 4 : 10 :: 9 : ?
The relationship is adding 6. So 4 + 6 = 10, and 9 + 6 = 15
addition, basic

Question 15

Find the missing number: 1 : sum of 2 terms = 5 :: 3 : sum of 2 terms = ?
Sum of 2 terms of AP: n/2 × (2a + (n-1)d). For 3, sum = 9
progression, sequence

Question 16

Find the missing number: 11 : 33 :: 5 : ?
The relationship is multiplying by 3. So 11 × 3 = 33, and 5 × 3 = 15
multiplication, basic

Question 17

Find the missing number: 7 : 5 :: 37 : ?
The relationship is the previous prime number. Previous prime before 37 is 31
prime, advanced

Question 18

Find the missing number: 2 : sum of 2 terms = 7 :: 5 : sum of 2 terms = ?
Sum of 2 terms of AP: n/2 × (2a + (n-1)d). For 5, sum = 13
progression, sequence

Question 19

Find the missing number: 7 : 5 :: 41 : ?
The relationship is the previous prime number. Previous prime before 41 is 37
prime, advanced

Question 20

Find the missing number: 96 : 42 :: 67 : ?
The relationship is the difference between number and product of its digits. |67 - 42| = 25
product, digits
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