The set of natural numbers
The set of days in a week
The set of prime numbers greater than 10
The set of vowels in the English alphabet
{6}
{2, 4, 6, 8, 10, 12}
{3, 9}
{}
2^4 × 3
2^2 × 3^3
2^3 × 3^2
2^6 × 3
X=5
x = 6
X = 25
X = 7
12
10
18
6
24
12
28
8
159
150
156
200
2πrh + 2πr²
2πrh
2πr²
None
40 square cm
20 square cm
80 square cm
None
4πr²
2πr
4/3πr³
None
42
18
50
52
40%
20%
20%
45%
Subtracted
Added
Divided
Multiplied
Subtracted
Added
Divided
Multiplied
Having higher degree 2
None
Having higher degree 1
Having higher degree 3