Reasoning Puzzle Practice Set 1

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1. If 24685 = 42867, then 35791 = ?

A) 37954  B) 53973  C) 45627  D) 69352

Explanation

Given: 24685 = 42867

So, the pattern is: +2,−2,+2,−2,+2

Now apply the same pattern to 35791: +2,−2,+2,−2,+2

Therefore, 35791 = 53973

Ans: B) 53973

2. Arrange in Systematic Order (সঠিক ক্ৰমত সাজাওক)

1. Thread — সূতা, 2. Cotton — কপাহ, 3. Soil — মাটি, 4. Cloth — কাপোৰ, 5. Rags — ফটা কাপোৰ. 6. Plant — গছ

A) 3, 2, 1, 4, 6, 5    B) 3, 6, 2, 1, 4, 5    C) 4, 1, 6, 3, 5, 2    D) 1, 2, 3, 6, 5, 4

Explanation: First comes soil because plants grow in soil. Then comes plant. From the plant we get cotton. Cotton is used to make thread. Thread is used to make cloth. Old cloth becomes rags.
ব্যাখ্যা : প্ৰথমে মাটি আহে, কাৰণ গছ মাটিত গজে। তাৰ পিছত গছ আহে। ছৰ পৰা কপাহ পোৱা যায়। কপাহৰ পৰা সূতা তৈয়াৰ কৰা হয়। সূতাৰে কাপোৰ তৈয়াৰ কৰা হয়। পুৰণি কাপোৰ ফটা কাপোৰত পৰিণত হয়। সেয়েহে, সঠিক ক্ৰম হৈছে - 3,6,2,1,4,5

Ans: B) 3, 6, 2, 1, 4, 5

3. ST : AB :: YZ : ?

A) BK  B) TS  C) CE  D) UV

Explanation: Trick

S → T = +1, A → B = +1

Same logic: Y → Z = +1

Now check options: U → V = +1

Therefore, YZ→UV

Ans: D) UV

4. 1, 4, 10, 20, 35, ?

A) 48  B) 56  C) 64  D) 70

Explanation: Trick

Find the differences: 4 − 1 = 3, 10 − 4 = 6, 20 − 10 = 10, 35 − 20 = 15

Pattern: +3,+6,+10,+15

Now differences increase by: +3, +4, +5

So next increase will be +6: 15 + 6 = 21

Now add: 35 + 21 = 56

Ans: B) 56

5. Relation: ‘Writer : Book :: ? : Song’

A) Engineer  B) Singer  C) Leader  D) Doctor

Explanation: A writer writes a book. Similarly, a singer sings a song.

Writer : Book :: Singer : Song

Ans: B) Singer

6. Analogy: ? : 342 :: 999 : 728

A) 511  B) 222  C) 480  D) 624

Explanation: Trick

Observe the relation between 999 and 728:

999 + 1 = 1000 = 10³

728 + 1 = 729 = 9³

1000 and 729 are consecutive cubes.

Now apply the same logic to ? : 342

342 + 1 = 343 = 7³

Previous consecutive cube: 8³ = 512

Now subtract 1: 512−1 = 511

Ans: A) 511