7 votes 7 votes Fill in the missing number in the series. $2$ $3$ $6$ $15$ ___ $157.5$ $630$ Quantitative Aptitude gate2014-ec-2 number-series quantitative-aptitude numerical-answers + – makhdoom ghaya asked Mar 18, 2016 • edited Jun 7, 2018 by Milicevic3306 makhdoom ghaya 1.6k views answer comment Share Follow See 1 comment See all 1 1 comment reply Anishag26 commented Dec 20, 2021 reply Follow Share 2 3 6 15 _________________ 157.5 630 this question is time consuming to find out the series in one go but with practice we can succeed. Actually this question has two multiple series going on . firstly of 0.5 multiplication but those 1.5 are incrementing by 1 and then multiplying. Secondly , we are multiplying by natural number 1 ,2 ,3 ……… So our answer comes as 2 * 1.5 = 3 3 * 2 = 6 6 * 2.5 = 15 15 * 3 = 45 45 * 3.5 = 157.5 157.5 * 4 = 630 So , the answer is 45. 3 votes 3 votes Please log in or register to add a comment.
Best answer 16 votes 16 votes $2\times 1.5=3$ $3\times 2=6$ $6\times 2.5=15$ $15\times 3=45$ is answer $45\times 3.5=157.5$ means each time increase multplication factor by $0.5$ rajan answered Mar 18, 2016 • edited Dec 6, 2017 by pavan singh rajan comment Share Follow See 1 comment See all 1 1 comment reply ankit3009 commented Jan 25, 2021 reply Follow Share How you get this? Any trick for it. I have been trying since half hour. 1 votes 1 votes Please log in or register to add a comment.