1 5 9 13 17 21 AND WHAT NUMBER WILL BE NEXT Share with your friends Share 0 Purva answered this 25 because 1 + 4 = 5, 5 + 4 = 9, 9 + 4 = 13, 13 + 4 = 17, 17 + 4 = 21, 21 + 4 = 25 3 View Full Answer Sumaiya Arshad answered this 25 0 Shikha Chakraborty answered this 25, because each number has a gap of 3. 1 Shet Prajwal P answered this 25 since the numbers are being increased by 4 0 Vaishnavi answered this 25,Because the numbers are being increased by 4;1+4=5+4=9+4=13+4=17+4=21 and 21 +4=25 25 is the verified answer. -1 Sambhav answered this 25 because every number is being added by 4 0
