Category: Arithmetic

Question Number 204348 by BaliramKumar last updated on 14/Feb/24 $$3\times 7\times 11+7\times 11\times 15+11\times 15\times 19+\dots \dots \dots .+39\times 43\times 47=?$$ Answered by MM42 last updated on 14/Feb/24 $$\underset{1}{\sum ^{10}}(4n-1)(4n+3)(4n+7)$$$$=\underset{\mathrm{1}} {\overset{\mathrm{10}}…

Question Number 203901 by explorerapollo last updated on 01/Feb/24 Terms of Service Privacy Policy Contact: info@tinkutara.com

Question Number 203788 by BaliramKumar last updated on 28/Jan/24 $$\mathrm{The}\mathrm{sum}\mathrm{of}\mathrm{all}\mathrm{possible}\mathrm{products}\mathrm{taken}\mathrm{two}\mathrm{at}$$$$\mathrm{a}\mathrm{time}\mathrm{out}\mathrm{of}\mathrm{the}\mathrm{numbers}\pm 1,\pm 2,\pm 3,\pm 4\mathrm{is}$$$$\left(\mathrm{a}\right)0\left(\mathrm{b}\right)-30\left(\mathrm{c}\right)30\left(\mathrm{d}\right)55$$ Answered by mr W last updated on 28/Jan/24 $${to}\:{take}\:{two}\:{from}\:\mathrm{8}\:{there}\:{are}\:…

Question Number 203051 by ajfour last updated on 08/Jan/24 $$Atwodigitnumber{\left(AB\right)}_{10}$$$${\left(AB\right)}_{10}-A^B={\left(BA\right)}_{10}$$$$Findthenumber.Thereisapoem.$$$$Havingarrivedattheageof{\left(BA\right)}_{10}.$$ Answered by Rasheed.Sindhi last…

Question Number 202774 by BaliramKumar last updated on 03/Jan/24 $$1.{\mathrm{S}}_{\mathrm{n}}=\mathrm{a}(\mathrm{a}+\mathrm{d})+(\mathrm{a}+\mathrm{d})(\mathrm{a}+2\mathrm{d})+\dots \dots +\{\mathrm{a}+(\mathrm{n}-1)\mathrm{d}\}\{\mathrm{a}+\left(\mathrm{n}\right)\mathrm{d}\}$$$$2.{\mathrm{S}}_{\mathrm{n}}=\mathrm{a}(\mathrm{a}+\mathrm{d})(\mathrm{a}+2\mathrm{d})+(\mathrm{a}+\mathrm{d})(\mathrm{a}+2\mathrm{d})(\mathrm{a}+3\mathrm{d})+\dots \dots +\{\mathrm{a}+(\mathrm{n}-1)\mathrm{d}\}\{\mathrm{a}+\left(\mathrm{n}\right)\mathrm{d}\}\{\mathrm{a}+(\mathrm{n}+1)\mathrm{d}\}$$$$$$ Answered by Rasheed.Sindhi last updated on 03/Jan/24…