Classification (Odd One Out) — Practice

Question 1

Find the odd one out: Rose, Lotus, Marigold, Mango.
(a) Rose (b) Lotus (c) Marigold (d) Mango

Accepted Answer

(d) Mango.

The first three are flowers; mango is a fruit.

Question 2

Find the odd one out: 3, 5, 11, 14, 17.
(a) 5 (b) 11 (c) 14 (d) 17

Accepted Answer

(c) 14.

All are prime numbers except 14 (also the only even number in the list).

Question 3

Find the odd one out: Copper, Iron, Gold, Brass.
(a) Copper (b) Iron (c) Gold (d) Brass

Accepted Answer

(d) Brass.

Copper, iron and gold are pure metals; brass is an alloy (copper + zinc).

Question 4

Find the odd one out: 8, 27, 64, 100, 125.
(a) 27 (b) 64 (c) 100 (d) 125

Accepted Answer

(c) 100.

8, 27, 64 and 125 are perfect cubes (2³, 3³, 4³, 5³); 100 is a perfect square, not a cube.

Question 5

Find the odd one out: AD, EH, IL, MP, QU.
(a) EH (b) IL (c) MP (d) QU

Accepted Answer

(d) QU.

AD, EH, IL, MP each span a gap of 3 letters; QU spans 4 (Q=17, U=21).

Question 6

Find the odd one out: 10, 25, 45, 54, 60.
(a) 25 (b) 45 (c) 54 (d) 60

Accepted Answer

(c) 54.

All are divisible by 5 except 54.

Question 7

Find the odd one out: BCD, FGH, LMN, PQR, STU.
(a) FGH (b) LMN (c) PQR (d) STU

Accepted Answer

(d) STU.

The first four are three consecutive consonants; STU contains the vowel U.

Question 8

Find the odd one out: 4, 16, 36, 49, 64.
(a) 16 (b) 36 (c) 49 (d) 64

Accepted Answer

(c) 49.

All are perfect squares, but 4, 16, 36, 64 are squares of even numbers; 49 = 7² is the square of an odd number.

Question 9

Find the odd one out: 121, 144, 169, 196, 200.
(a) 121 (b) 144 (c) 169 (d) 200

Accepted Answer

(d) 200.

121, 144, 169, 196 are perfect squares (11², 12², 13², 14²); 200 is not a perfect square.

Practice — Classification (Odd One Out)