Rahul Sofat Solutions for Chapter: Integers, Exercise 10: SOME NCERT TEXTBOOK QUESTIONS

Write a pair of negative integers whose difference gives $8$.

Write a negative integer and a positive integer whose sum is $-5.$

Write a negative integer and a positive integer whose difference is $-3.$

In a quiz, team A scored $-40,10,0$ and team B scored $10,0,-40$ in three successive rounds. Which team scored more? Can we say that we can add integers in any order?

Verify the following:

$18\times \left[7+\left(-3\right)\right]=\left[18\times 7\right]+\left[18\times \left(-3\right)\right]$

Verify the following:

$\left(-21\right)\times \left[\left(-4\right)+\left(-6\right)\right]=\left[\left(-21\right)\times \left(-4\right)\right]+\left[\left(-21\right)\times \left(-6\right)\right]$

Write five pairs of integers $\left(a, b\right)$ such that $a÷b= -3$. One such pair is $\left(6, -2\right)$ because $6÷\left(-2\right)=\left(-3\right)$.

The temperature at $12$ noon was $10°\mathrm{C}$ above zero. If it decreases at the rate of $2°\mathrm{C}$ per hour until midnight, at what time would the temperature be $8°\mathrm{C}$ below zero? What would be the temperature at mid-night?