Concept 1:

Letter Classification

Eg: PCOG, KLIZ, BUDX, FQMV, ARTG (Each term consists of a vowel except FQMV)

RNJH, SOKG, QMIE, MIEA, PLHD (Logic: Gap between consecutive letters)

Concept 2:

Number Classification

Eg: 8314, 2709, 1315, 2518, 3249 (Logic: Sum of first three digits = Last digit)

25, 36, 78, 144, 196 (Logic: Except 78 remaining all are perfect squares)

Concept 3:

Word Classification

Eg: Biscuits, Chocolates, Cakes, Bread, Pastry (Logic: Except ‘Chocolates’ remaining all are baked items)

Actor, Artist, Musician, Dancer, Poet (Logic: Except Poet remaining all are ‘Stage Performers’)

In the following question, select the odd number pair from the given alternatives.

A) 21 – 400     B) 22 – 441       C) 24 – 519       D) 26 – 625      E) 28 - 729       

SOLUTION:

Here the logic is,

The second number in the pair is a square of the number by subtracting 1 from the first number in respective pair.

400 = 21 – 1 = 20²

441 = 22 – 1 = 21²

519 = 24 – 1 = 23² = 529, which is not correct

625 = 26 – 1 = 25²

729 = 28 – 1 = 27²             

Hence, the odd number among the given numbers is 24 – 519.

ANSWER: C

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