Mathematical Symbols

Question 1

∈

Answer 1

ELEMENT OF

Question 1

∉

Answer 1

NOT AN ELEMENT OF

Question 2

∎

Answer 2

END OF PROOF

Question 3

−

Answer 3

MINUS SIGN ( to subtract,minus,take)
(negative sign = negative, minus, the opposite of)

Question 4

∓

Answer 4

MINUS-OR-PLUS SIGN

Question 5

∕

Answer 5

DIVISION SLASH/ Obelus ( divide by,over)

Question 6

√

Answer 6

SQUARE ROOT

Question 7

∛

Answer 7

CUBE ROOT

Question 8

∜

Answer 8

FOURTH ROOT

Question 9

∞

Answer 9

INFINITY

Question 10

+

Answer 10

Plus sign (plus, add)

Question 10

∠

Answer 10

ANGLE

Question 11

∧

Answer 11

LOGICAL AND

Question 12

∨

Answer 12

LOGICAL OR

Question 13

∩

Answer 13

INTERSECTION

Question 14

∪

Answer 14

UNION

Question 15

≅

Answer 15

APPROXIMATELY EQUAL TO

Question 16

≈

Answer 16

ALMOST EQUAL TO

Question 17

≠

Answer 17

NOT EQUAL TO

Question 18

≤

Answer 18

LESS-THAN OR EQUAL TO

Question 19

≥

Answer 19

GREATER-THAN OR EQUAL TO

Question 20

⊂

Answer 20

proper SUBSET OF

Question 21

⊄

Answer 21

NOT A SUBSET OF

Question 22

X

Answer 22

times,multiply by
Cartesian product/ cross product/cross

Question 23

ø

Answer 23

Empty Set

Question 24

Á,–A

Answer 24

complement of A, A prime

Question 25

G.C.D

Answer 25

Greatest Common Divisor

Question 26

L.C.D

Answer 26

Least Common Denominator/ Multiple

Question 27

N!

Answer 27

n factorial

Question 28

|a|

Answer 28

absolute value of a, modulus of a, numerical value of a

Question 29

1.5

Answer 29

one and a half / one point five

Question 30

10,000

Answer 30

ten thousand

Question 31

0

Answer 31

Zero, oh, nought , love, nil

Question 32

A’

Answer 32

complement of A, A prime

Question 33

X

Answer 33

cross product ( Cartesian product )

Question 34

(a,b)

Answer 34

the open interval a<x<b / inner product of the elements a and b of a vector space

Question 35

Ā

Answer 35

complex conjugate of matrix A

Question 36

||A||

Answer 36

the norm of the matrix A

Question 37

f(x)

Answer 37

f of (x), the value at x of the function f

Question 38

f^-1(x)

Answer 38

the value of the inverse of f at x

Question 39

—>

Answer 39

tends to / approaches

Question 40

x~y

Answer 40

x similar to y

Question 41

<—->

Answer 41

if and only if (iff)