Math Facts 1 – Squares, Roots, and Powers of Primes

This is an interactive set of flashcards testing your knowledge of perfect squares, square roots of perfect squares, powers of primes, and a few other important facts that successful GMAT students have at their fingertips. You will have 4 minutes to complete the set.

Math Factor 1 - Squares, Square Roots, and Powers of Primes

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Squares, Roots, and Powers of Primes is basically a math facts quiz. These basic facts should become your "friends," so that you can recognize them in context and use them to your advantage when performing seeminly difficult calculations.

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Congratulations - you have completed Math Factor 1 - Squares, Square Roots, and Powers of Primes. You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%

Your answers are highlighted below.

Question 1

\(\sqrt{361}\)

A	21
B	19

Question 1 Explanation:

\(\sqrt{361} = 19\). The correct answer is B.

Question 2

\(23^2\)

A	429
B	389
C	529
D	419
E	469

Question 2 Explanation:

\(23^2 = 529\). The correct answer is A.

Question 3

\(\sqrt{324}\)

A	18
B	12
C	22

Question 3 Explanation:

\(\sqrt{324} = 18\). The correct answer is B.

Question 4

\(2^3\)

A	8
B	6
C	2
D	4
E	9

Question 4 Explanation:

\(2^3 = 8\). The correct answer is D.

Question 5

\(\sqrt{5}\) is approximately

A	2.15
B	2.24
C	2.14
D	2.3
E	2.25

Question 5 Explanation:

\(\sqrt{5}\) is approximately 2.24. The correct answer is C.

Question 6

\(\sqrt{289}\)

A	17
B	23
C	13

Question 6 Explanation:

\(\sqrt{289} = 17\). The correct answer is B.

Question 7

\(2^{10}\)

A	64
B	1024
C	256
D	512
E	128

Question 7 Explanation:

\(2^{10} = 1024\). The correct answer is A.

Question 8

\(2^6\)

A	64
B	24
C	12
D	32
E	50

Question 8 Explanation:

\(2^6 = 64\). The correct answer is E.

Question 9

\(2^7\)

A	14
B	256
C	32
D	64
E	128

Question 9 Explanation:

\(2^7 = 128\). The correct answer is B.

Question 10

\(2^5\)

A	24
B	64
C	32
D	50
E	10

Question 10 Explanation:

\(2^5 = 32\). The correct answer is C.

Question 11

\(5^4\)

A	250
B	125
C	500
D	625
E	1025

Question 11 Explanation:

\(5^4= 625\). The correct answer is B.

Question 12

\(3^3\)

A	9
B	36
C	81
D	18
E	27

Question 12 Explanation:

\(3^3 = 27\). The correct answer is C.

Question 13

\(22^2\)

A	484
B	524
C	544
D	444
E	404

Question 13 Explanation:

\(22^2 = 484\). The correct answer is C.

Question 14

\(18^2\)

A	364
B	284
C	496
D	360
E	324

Question 14 Explanation:

\(18^2 = 324\). The correct answer is D.

Question 15

\(2^8\)

A	16
B	256
C	128
D	32
E	64

Question 15 Explanation:

\(2^8 = 256.\) The correct answer is A.

Question 16

\(24^2\)

A	526
B	326
C	576
D	376
E	476

Question 16 Explanation:

\(24^2 = 576\). The correct answer is E.

Question 17

\(7^2\)

A	7
B	49
C	14
D	35
E	21

Question 17 Explanation:

\(7^2 = 49\). The correct answer is E.

Question 18

\(\sqrt{441}\)

A	11
B	21
C	19

Question 18 Explanation:

\(\sqrt{441} = 21\) The correct answer is C

Question 19

\(25^2\)

A	725
B	425
C	675
D	525
E	625

Question 19 Explanation:

\(25^2 = 625\). The correct answer is C.

Question 20

\(\sqrt{256}\)

A	16
B	14
C	24

Question 20 Explanation:

\(\sqrt{256} = 16\). The correct answer is B.

Question 21

\(7^3\)

A	35
B	14
C	343
D	49
E	140

Question 21 Explanation:

\(7^3 = 343\). The correct answer is E.

Question 22

\(3^5\)

A	15
B	81
C	243
D	300
E	27

Question 22 Explanation:

\(3^5 = 243\). The correct answer is D.

Question 23

\(13^2\)

A	144
B	169
C	229
D	296
E	289

Question 23 Explanation:

\(13^2 = 169\). The correct answer is B.

Question 24

\(5^2\)

A	10
B	25
C	15
D	20
E	50

Question 24 Explanation:

\(5^2= 25\). The correct answer is D.

Question 25

\(12^2\)

A	132
B	144
C	169
D	100
E	184

Question 25 Explanation:

\(12^2 = 144\). The correct answer is C.

Question 26

\(\sqrt{169}\)

A	13
B	23

Question 26 Explanation:

\(\sqrt{169} = 13\). The correct answer is A.

Question 27

\({\sqrt{2}}^4\)

A	6
B	1
C	8
D	4
E	2

Question 27 Explanation:

\({\sqrt{2}}^4 = {{\sqrt{2}}^2}^2 = 2^2 = 4\)

Question 28

\(3^2\)

A	12
B	81
C	9
D	6
E	27

Question 28 Explanation:

\(3^2 = 9\). The correct answer is B.

Question 29

If \(x \neq 0\), then \(x^0 = ?\)

A	1
B	0

Question 29 Explanation:

Anything to the zero power is 1!

Question 30

\(19^2\)

A	321
B	289
C	361
D	211
E	249

Question 30 Explanation:

\(19^2 = 361\). The correct answer is A.

Question 31

\(\sqrt{576}\)

A	14
B	26
C	24
D	16

Question 31 Explanation:

\(\sqrt{576} = 24\). The correct answer is C.

Question 32

\(\sqrt{225}\)

A	25
B	15

Question 33

\(\sqrt{484}\)

A	18
B	12
C	22

Question 33 Explanation:

\(\sqrt{484} = 22\). The correct answer is A.

Question 34

\(16^2\)

A	196
B	256
C	116
D	216
E	169

Question 34 Explanation:

\(16^2 = 256\). The correct answer is A.

Question 35

\(5^3\)

A	215
B	25
C	625
D	125
E	50

Question 35 Explanation:

\(5^3 = 125\). The correct answer is C.

Question 36

\(\sqrt{3}\) is approximately

A	1.6
B	1.5
C	1.3
D	1.7
E	1.4

Question 36 Explanation:

\(\sqrt{3}\) is approximately 1.7. The correct answer is E.

Question 37

\(17^2\)

A	269
B	189
C	289
D	340
E	229

Question 37 Explanation:

\(17^2 = 289\). The correct answer is D.

Question 38

\(3^4\)

A	18
B	9
C	12
D	81
E	27

Question 38 Explanation:

\(3^4 = 81\). The correct answer is A.

Question 39

\(\sqrt{196}\)

A	16
B	24
C	14

Question 40

\(\sqrt{x^2}\)

A	\(x\)
B	\(\|x\|\)
C	\(-x\)

Question 40 Explanation:

\(\sqrt{anything^2} = |anything|\).

Question 41

\(14^2\)

A	214
B	96
C	116
D	196
E	156

Question 41 Explanation:

\(14^2 = 196\). The correct answer is D.

Question 42

\(21^2\)

A	461
B	121
C	411
D	361
E	441

Question 42 Explanation:

\(21^2 = 441\). The correct answer is D.

Question 43

\({\sqrt{50}}^2\)

A	25
B	100
C	50

Question 44

\(\sqrt{529}\)

A	13
B	23

Question 44 Explanation:

\(\sqrt{529} = 23\). The correct answer is B.

Question 45

\({\sqrt{x}}^2\)

A	\(x\)
B	\(-x\)
C	\(\|x\|\)

Question 45 Explanation:

Square and square root are inverse operations, so you just end up where you started.

Question 46

\(2^4\)

A	8
B	10
C	20
D	16
E	14

Question 46 Explanation:

\(2^4\). The correct answer is 16.

Question 47

\(15^2\)

A	250
B	225
C	125
D	30
E	205

Question 47 Explanation:

\(15^2 = 225\). The correct answer is D.

Question 48

\(\sqrt{625}\)

A	25
B	15

Question 48 Explanation:

\(\sqrt{625} = 25\). The correct answer is B.

Question 49

\(\sqrt{2}\) is approximately

A	1.3
B	1.6
C	1.5
D	1.4
E	1.7

Question 49 Explanation:

\(\sqrt{2}\) is approximately 1.4. The correct answer is B.

Question 50

\(2^9\)

A	128
B	256
C	512
D	64
E	32

Question 50 Explanation:

\(2^9 = 512\). The correct answer is E.

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Math Factor 1 - Squares, Square Roots, and Powers of Primes

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