div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentjustmaths-maths-tutorials-resources-and-support-2016-1-2-tower-2-tower-3htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: JustMaths - Maths Tutorials Resources and Support · 2016 1 2 · Tower 2 Tower 3 13 Tower 4 d Find an expression for the number of cubes used in the bottom layer of tower n loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer2022051920600c8d53bccdbe1ff76442aahtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentjustmaths-maths-tutorials-resources-and-support-2016-1-2-tower-2-tower-3htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: JustMaths - Maths Tutorials Resources and Support · 2016 1 2 · Tower 2 Tower 3 13 Tower 4 d Find an expression for the number of cubes used in the bottom layer of tower n loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader034fdocumentsusreader034viewer2022051920600c8d53bccdbe1ff76442aahtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentjustmaths-maths-tutorials-resources-and-support-2016-1-2-tower-2-tower-3htmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: JustMaths - Maths Tutorials Resources and Support · 2016 1 2 · Tower 2 Tower 3 13 Tower 4 d Find an expression for the number of cubes used in the bottom layer of tower n loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...