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Number Analogy - Intermediate Level: prime numbers INTERMEDIATE

Quick mental agility ★ session: 20 intermediate-level number analogy questions. Worksheet 17 of 30 - Focus: prime numbers. Practice prime numbers, arithmetic operations, digit manipulation with instant feedback. Great for mid-level students needing moderate complexity with mixed patterns practice.

📝 Worksheet 17 of 30 • 20 questions • ⏱️ Estimated time: 20 minutes • 🎯 Intermediate level

What you'll learn in this worksheet:
Your progress through Number Analogy
Worksheet 17 of 30 (56% complete)

Question 1

Find the missing number: 26 : 23 :: 22 : ?
The subtractor alternates: -3 then -2. So 22 - 2 = 20
subtraction, basic

Question 2

Find the missing number: 5 : 120 :: 3 : ?
The relationship is factorial. 5! = 120, 3! = 6
factorial, advanced

Question 3

Find the missing number: 10 : 30 :: 3 : ?
The multiplier increases by 1: ×3 then ×4. So 3 × 4 = 12
multiplication, basic

Question 4

Find the missing number: 43 : 4 :: 5 : ?
The relationship is the gap to the next prime. Gap after 5 is 2
prime, advanced

Question 5

Find the missing number: 5 : 125 :: 5 : ?
The relationship is cubing the number. So 5³ = 125, and 5³ = 125
square, power

Question 6

Find the missing number: 76 : 42 :: 26 : ?
The relationship is the product of digits. Product of digits of 76 = 42, product of digits of 26 = 12
product, digits

Question 7

Find the missing number: 2, 4 : 6 :: 3, 4 : ?
Fibonacci pattern: each term is sum of previous two. 3 + 4 = 7
pattern, sequence

Question 8

Find the missing number: 2, 2, 3 : 7 :: 1, 3, 3 : ?
Tribonacci pattern: each term is sum of previous three. 1+3+3 = 7
pattern, sequence

Question 9

Find the missing number: 87 : 56 :: 97 : ?
The relationship is the product of digits. Product of digits of 87 = 56, product of digits of 97 = 63
product, digits

Question 10

Find the missing number: 3 : 9 :: 8 : ?
The relationship is squaring the number. So 3² = 9, and 8² = 64
multiplication, basic

Question 11

Find the missing number: 77 : 14 :: 42 : ?
The relationship is the sum of digits. Sum of digits of 77 = 14, sum of digits of 42 = 6
digit, sum

Question 12

Find the missing number: 45 : 9 :: 20 : ?
The relationship is dividing by 5. So 45 ÷ 5 = 9, and 20 ÷ 5 = 4
division, basic

Question 13

Find the missing number: 15 : 20 :: 6 : ?
The relationship follows an alternating addition pattern: +5, then +6. So 6 + 6 = 12
addition, basic

Question 14

Find the missing number: 25 : 15 :: 39 : ?
The relationship is the difference between number and product of its digits. |39 - 27| = 12
product, digits

Question 15

Find the missing number: 4 : 20 :: 3 : ?
The relationship is multiplying by 5. So 4 × 5 = 20, and 3 × 5 = 15
multiplication, basic

Question 16

Find the missing number: 7 : 49 :: 3 : ?
The relationship is squaring the number. So 7² = 49, and 3² = 9
multiplication, basic

Question 17

Find the missing number: 62 : 88 :: 27 : ?
The relationship is the sum of number and its reverse. 27 + 72 = 99
reverse, digits

Question 18

Find the missing number: 29 : 19 :: 20 : ?
The subtractor increases: -10 then -12. So 20 - 12 = 8
subtraction, basic

Question 19

Find the missing number: 143 : 12 :: 243 : ?
The relationship is the product of digits. Product of digits of 143 = 12, product of digits of 243 = 24
product, digits

Question 20

Find the missing number: 8 : 64 :: 7 : ?
The relationship is squaring the number. So 8² = 64, and 7² = 49
multiplication, basic
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