NA 26 34 72 46 All others have only 2 factors with prime number. 26 = 2 x 13, 34

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Question
NA
Options
A. 26
B. 34
C. 72
D. 46

Correct Answer

72

Explanation

All others have only 2 factors with prime number.
26 = 2 x 13, 34 = 2 x 17, 72 = 2 x 2 x 2 x 3 x 3,
46 = 2 x 23, 38 = 2 x 19

Classification problems

Search Results

1.
NA
Options
A. 12
B. 28
C. 52
D. 96

Discuss

Correct Answer: 96

Explanation:

All others have only 3 factors.
12 = 2 x 2 x 3, 28 = 2 x 2 x 7, 52 = 2 x 2 x 13
68 = 2 x 2 x 17, 96 = 2 x 2 x 2 x 2 x 2 x 3

2.
NA
Options
A. 12
B. 24
C. 42
D. 32

Discuss

Correct Answer: 32

Explanation:

All others are divisible by 3.

3.
NA
Options
A. 13
B. 43
C. 63
D. 23

Discuss

Correct Answer: 63

Explanation:

All others are prime numbers.

4.
NA
Options
A. 13
B. 17
C. 19
D. 27

Discuss

Correct Answer: 27

Explanation:

All others are prime numbers.

5.
NA
Options
A. 4
B. 64
C. 225
D. 47

Discuss

Correct Answer: 47

Explanation:

All others are complete squares.

6.
NA
Options
A. 11
B. 17
C. 45
D. 37

Discuss

Correct Answer: 45

Explanation:

All others are prime numbers.

7.
NA
Options
A. 729
B. 123
C. 423
D. 621

Discuss

Correct Answer: 729

Explanation:

Only '729' is a perfect cube.

8.
NA
Options
A. 121
B. 88
C. 97
D. 132

Discuss

Correct Answer: 97

Explanation:

Except '97', all are divisible by 11.

9.
NA
Options
A. 15
B. 27
C. 37
D. 39

Discuss

Correct Answer: 37

Explanation:

This is the only prime number in the group.

10.
NA
Options
A. 11
B. 8
C. 14
D. 66

Discuss

Correct Answer: 11

Explanation:

This is the only prime number in the group.

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