Math & Logic Puzzles
Math & Logic Puzzles
1. What comes next in the pattern ?
2, 4, 8, 16, ___
Ans: 32
Explanation:
Each number is multiplied by 2:
2 × 2 = 4
4 × 2 = 8
8 × 2 = 16
16 × 2 = 32
2. I am a number. Multiply me by 2 and add 6. The result is 22. What am I ?
Ans: 8
Explanation:
Let the number be x.
2x + 6 = 22
2x = 22 - 6 = 16
x = 16 ÷ 2 = 8
3. What is the smallest even number greater than 0 ?
Ans: 2
Explanation:
Even numbers are divisible by 2. The smallest even number after 0 is 2.
4. If a hen lays 1 egg every day, how many eggs in 2 weeks ?
Ans: 14
Explanation:
1 week = 7 days
2 weeks = 7 × 2 = 14 days
So, the hen lays 14 eggs.
5. What number is missing: 5, __, 15, 20, 25 ?
Ans: 10
Explanation:
The numbers increase by 5 each time:
5, 10, 15, 20, 25
So the missing number is 10.
6. Half of 100 is __?
Ans: 50
Explanation:
100 ÷ 2 = 50
7. 3 pencils cost ₹9. How much do 6 pencils cost ?
Ans: ₹18
Explanation:
Cost of 1 pencil = 9 ÷ 3 = ₹3
Cost of 6 pencils = 6 × 3 = ₹18
8. What number is 3 more than double of 7 ?
Ans: 17
Explanation:
Double of 7 = 7 × 2 = 14
3 more than 14 = 14 + 3 = 17
9. Which number is both a square and a cube ?
Ans: 64
Explanation:
64 = 8 × 8 = 8² (square)
64 = 4 × 4 × 4 = 4³ (cube)
So, 64 is both a square and a cube.
10. What comes next: 1, 4, 9, 16, __?
Ans: 25
Explanation:
These are squares of numbers:
1² = 1
2² = 4
3² = 9
4² = 16
5² = 25