classification Model Questions & Answers, Practice Test for ssc cgl tier 1

Question :16

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?

Answer: (b)

All others are negative.

Question :17

Four of the following five are alike in a certain way and hence form a group. Which is the one that does not belong to the group?

Answer: (a)

All others imply 'UP'.

Question :18

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?

Answer: (b)

Except 255 all other numbers are one more than perfect square.

50 = (7)2 + 1, 65 = (8)2 + 1;

170 = (13)2 + 1, 290 = (27)2 + 1

But, 255 = (16)2 – 1

Question :19

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?

Answer: (b)

115 = 5 × 23;

85 = 5 × 17;

95 = 5 × 19;

155 = 5 × 31;

But, 75 = 5 × 15

One factor of 75 is not a Prime Number.

Question :20

Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?

Answer: (a)

Except Diabetes, all others are infectious diseases.

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