Railway RRB / NTPC - MCQ Practice Questions

To find a percentage of a number, multiply the number by the percentage expressed as a decimal: $15\%\text{ of }240=0.15\times 240$.

Step 1: Convert percentage to decimal

Convert 15% to its decimal form:

Step 2: Multiply by the base number

Alternatively, using fractions:

Answer: 36 (Option A)

Average speed = Distance/Time = $\frac{360}{6}$ = 60 km/h

√196 = 14 (since 14 × 14 = 196)

To simplify this expression, we apply the order of operations (BODMAS/PEMDAS): Brackets, Orders, Division & Multiplication (left to right), then Addition & Subtraction (left to right).

Step 1: Perform Division

Division comes before addition and subtraction, so evaluate $12÷4$ first.

The expression becomes:

Step 2: Perform Multiplication

Next, evaluate $2\times 3$.

The expression becomes:

Step 3: Perform Addition and Subtraction (Left to Right)

Now evaluate from left to right.

Step 4: Final Subtraction

**Answer: $5$ (Option A)**

5x = 35 - 10 = 25, so x = 5