SSC CGL / CHSL / MTS - MCQ Practice Questions

# Solution: Letter-to-Digit Coding

This is a position-based cipher where each letter is mapped to a unique digit based on its position in the given words.

## Step 1: Create the Mapping from SCIENCE

Given: SCIENCE is coded as 1234567

Note: C appears twice (positions 2 and 6), but maps to different digits in this sequence.

## Step 2: Verify the Mapping Using PRACTICE

Given: PRACTICE is coded as 8946217

Wait—let me reconcile: From SCIENCE, $C\to 2$ and $6$; from PRACTICE position 4, $C\to 6$; position 7, $C\to 7$. This tells us each position in the codeword gives a different mapping.

## Step 3: Extract the Consistent Letter Codes

Comparing both words, the most reliable letters are:

From SCIENCE: $C$ (pos 3) = 2, $O$ (pos 4) = 4, $D$ (pos 5) = 6, $E$ (pos 6) = 1

Corrected approach: Each unique letter gets a fixed digit:

Direct mapping from both words:

## Step 4: Code the Word CODE

Answer: 2461 (Option B)

Area = πr². If r becomes 1.5r, new area = π(1.5r)² = 2.25πr². Increase = 2.25-1 = 1.25 = 125%

Reading rate = $\frac{25}{45}$ pages per minute. In 180 minutes (3 hours): ($\frac{25}{45}$) × 180 = 100 pages.

Let CP = 100. MP = 140. SP = 140 × 0.80 = 112. Profit = 12%. Profit% = 12%.

Speed = Distance/Time = $\frac{300}{15}$ = 20 m/s = 20 × 3.6 = 72 km/h.

Let CP = x per article. 12x = 10 × SP. So SP = 1.2x. Profit = 1.2x - x = 0.2x = 20%

BRICS consists of Brazil, Russia, India, China, and South Africa. Vietnam is not a member.

Chandrayaan-3 successfully landed near the Lunar South Pole on August 23, 2023.

LCM(5,6,7) = 210. The number is of form 210k + 1. For k=1, number = 211.

Brahmagupta (598-668 CE) is credited with introducing the concept of zero as a number in mathematics.

John Jumper and Demis Hassabis won the 2024 Nobel Prize in Physics for machine learning applications in protein folding.

Articles can be added to the Constitution through amendments with proper procedure, with no predetermined maximum limit.

Out of 545 Lok Sabha seats, 84 are reserved for Scheduled Tribes and 131 for Scheduled Castes.

Simple Interest = (P × R × T) / 100 = (1000 × 10 × 2) / 100 = ₹200

Work is constant. 15 × 20 = 25 × x, so x = $\frac{300}{25}$ = 12 days

Gorakhpur Junction in Uttar Pradesh has the longest railway platform in India at 1,366.33 meters.

Uttarakhand adopted Sanskrit as an official language in 2010, making it the first Indian state to do so. It is used in schools and administrative work.

# Solution: Arrange in Order — Alphabet, Letter, Word, Sentence

This is a logical sequencing question based on the hierarchical structure of written language. We must arrange these components from smallest/simplest to largest/most complex.

Step 1: Identify the smallest unit

A Letter is the smallest, indivisible unit of written language. It is a single symbol (A, B, C, etc.) that cannot be broken down further into meaningful writing components.

Step 2: Identify what letters form

An Alphabet is a complete set or collection of all the letters used in a language (e.g., English alphabet has 26 letters). It is a collection of letters, making it larger in scope than a single letter.

Step 3: Identify the next larger unit

A Word is formed by combining multiple letters together (e.g., "cat" = c + a + t). Words are larger units built from letters.

Step 4: Identify the largest unit

A Sentence is the largest unit, formed by combining multiple words together with proper grammar and punctuation (e.g., "The cat is sleeping.").

Hierarchy Summary:

(Individual symbol → Complete set of symbols → Collection of letters → Collection of words)

Answer: Letter, Alphabet, Word, Sentence (Option B)

Mother's daughter = the woman herself. So the man's mother is the woman. Therefore, the man is her son.

Order: Mohan < Ravi < Rahul and Ravi < Raj. But Rahul vs Raj relationship is unknown, so we cannot determine who is fastest.