All Exams Test series for 1 year @ ₹349 only
Question

Evaluate \(22^3 + (-18)^3 + (-4)^3\).

This question was previously asked in
RRB NTPC 2025 Under Graduate CBT 1 Question Paper PDF (20-Jun-2026) (Shift 3)
The correct answer is

4752

Let \(a = 22\), \(b = -18\), \(c = -4\). Since \(a + b + c = 22 - 18 - 4 = 0\), the identity \(a^3 + b^3 + c^3 = 3abc\) applies.

So \(a^3 + b^3 + c^3 = 3 \times 22 \times (-18) \times (-4) = 3 \times 1584 = 4752\).

Hence, the value of the expression is 4752.

Was this answer helpful?

Similar Questions

  1. If $a + b + c = 10$ and $ab + bc + ca = 31$, find the value of $a^2 + b^2 + c^2$
  2. If $a + b + c = 0$, then find the value of $\frac{(a^2+b^2+c^2)^2}{a^2b^2+b^2c^2+c^2a^2}$

  3. If $x^4 + \frac{1}{x^4} = 322$, then $x^3 - \frac{1}{x^3} = ?$
  4. What is the value of the following expression:

    $(1 + x)(1 + x^2)(1 + x^4)(1 + x^8)(1 - x)$
  5. If $a + b + c = 17$, $abc = 168$, and $ab + bc + ca = 94$, then $a^3 + b^3 + c^3 = ?$
  6. If $a = \frac{b^2}{b - a}$, then the value of $a^3 + b^3$ is:
  7. If $ab = 10$ and $a^{2} + b^{2} = 29$, then $(a - b)^{2} = ?$
  8. If $(x + \frac{1}{x}) = 7$, then $(x - \frac{1}{x})$ is equal to:
  9. Find the value of $\frac{(74 + 47)^2 + (74 - 47)^2}{74^2 + 47^2}$
  10. If $x = 3 + \sqrt{5}$ and $y = 3 - \sqrt{5}$, then find the value of $x^2 + y^2$.

Important Questions from Identities

  1. The coefficient of y in the expansion of (2y – 5) 3, is:

  2. If x + y = 2 and \(\frac{1}{x}+\frac{1}{y}=\frac{18}{5}\) , then the value of (x 3+ y 3) is:

  3. If x - y = 11 and \(\rm \frac{1}{x} - \frac{1}{y} = \frac{11}{24}\)  then the value of x 3 - y 3 + x 2y 2 ?

  4. If 2x 2- 8x - 1 = 0, then what is the value of \(\rm 8x^3 - \frac{1}{x^3}\) ?

  5. If \(\rm x+ \frac{1}{x} = 4,\)  then the value of  \(\rm x^5 + \frac{1}{x^5}\)  is:

Need Expert Advice?
Upcoming Exams
RRB ALP
July 28, 2026
RRB Group D
August 03, 2026
Test Series
RRB NTPC img
Railways
RRB NTPC Under Graduate 2026 New Mock Test Series
1459 Tests 2 Tests Free
216 Attempts
4.3(512)
English, Hindi, Telugu +7 More

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App