Question 2 :
Simplify and write the answer in the exponential form.$(– 4)^{– 3} × (5)^{– 3} × (–5)^{– 3}$

Question 3 :
By what number should $(–8)^{–3}$ be multiplied so that that the product may be equal to $(–6)^{–3}$?

Question 5 :
Find two repeater machines that will do the same work as a (× 81) machine.

Question 6 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccd4f59b460d7261edf6.PNG' /> From the above figure, supply the missing information for diagram.

Question 7 :
Find a repeater machine that will do the same work as a $(× \frac{1}{8})$ machine.

Question 12 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cccef59b460d7261edee.PNG' /> Refer to the above image. Determine whether there is a single repeater machine that will do the same work. If so, describe it.

Question 13 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1ccd0f59b460d7261edf1.PNG' /> Refer to the above image. Shikha has an order from a golf course designer to put palm trees through a $(× 2^3)$ machine and then through a $(× 3^3)$ machine. She thinks she can do the job with a single repeater machine. What single repeater machine should she use?

Question 21 :
Find the value of $(2^{– 1} × 4^{– 1}) ÷ 2^{– 2}$

Question 22 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1cccff59b460d7261edef.PNG' /> Refer to the above image. Determine whether there is a single repeater machine that will do the same work. If so, describe it.