The value of ((8.9)^2 - (2.1)^2)/(8.9 - 2.1) Option 1: 8.6 Option 2: 6.8 Option 3: 10.0 Option 4: 11.0

Answer: 11.0. Solution: Using the identity (a^2 - b^2)/(a - b) = a + b: ((8.9)^2 - (2.1)^2)/(8.9 - 2.1) = 8.9 + 2.1 = 11.0.

Quantitative Reasoning

Number System

Easy

The value of $\frac{(8.9)^2 - (2.1)^2}{8.9 - 2.1}$

8.6

6.8

10.0

11.0

✅ Correct Option: 4

Using the identity $\frac{a^2 - b^2}{a - b} = a + b$ : $\frac{(8.9)^2 - (2.1)^2}{8.9 - 2.1} = 8.9 + 2.1 = 11.0$ .

2026: 21 May Shift 2

In number system 3√2, is?

2025: 3 June Shift 2

Which one of the following is/are correct?

(A) Every irrational number is a real number.

(B) Every real number is an irrational number.

(D) The product or quotient of a non-zero rational number with an irrational number is an irrational number.

Choose the correct answer from the options given below:

2022: 20 Aug Shift 1

Match List I with List II:

List I	List II
A. Sum of first 5 primes	I. 15
B. Average of first 5 primes	II. 28
C. Sum of first 5 natural numbers	III. 3
D. Average of first 5 natural numbers	IV. 5.6

Choose the correct answer from the options given below:

2022: 26 Aug Shift 1

Find the value of $\sqrt[3]{117649}$ =

2022: 20 Aug Shift 1

$-\sqrt{8} + \sqrt{128} - \sqrt{32}$ is equal to

2025: 15 May Shift 1

Which of the following is/are prime numbers?

(A) 241

(B) 337

(D) 571

Choose the correct answer from the options given below: