What will be the next number in sequence. a)1,5,9,13,17,21,___. b)2,7,12,17,22,___. c)2,6,12,20,30,___. d)1,2,3,5,8,13,___. e)1,3,6,10,15,____. Share with your friends Share 2 Lovina Kansal answered this Dear student a) 1,5,9,13,17,21,?Pattern is: 1-5=-45-9=-49-13=-413-17=-417-21=-421-x=-4⇒21+4=x⇒x=25So, 1,5,9,13,17,21,25b) 2,7,12,17,22,?Pattern is:2-7=-57-12=-512-17=-517-22=-522-x=-5⇒22+5=x⇒x=27So, 2,7,12,17,22,27c) 2,6,12,20,30,?2+4=66+6=1212+8=2020+10=3030+12=42So, 2,6,12,20,30,42 similarly try other parts. Regards 1 View Full Answer Devika Rajeev answered this a]25 b]27 c]42 d]don't know sorry e]21 method a] 1 and 5 . their difference is 4.5 and 9 .Their difference is also 4.You can find out like this the answer for a. b]same as a] .They have 5 as their difference. c]This is according to even numbers.2 and 6.diffence is 4 .next pair you take the difference will be 6. d]DON'T know e]1 and 3 .Their difference is 2.3 and 6.Their difference is 3.the order and their differences will increase like this. THANK YOU I DON'T KNOW WHETHER IT WAS HELPFUL TO YOU. IF ANYTHING WRONG SORRY -3 Aryan answered this a)25 b)27 c)42 d)don't know e)21 -1 Khalid Bajaman answered this 25 2 Anshi Mishra answered this 25 27 42 whatever 21 -3 Ashmit answered this Dear student A) 25 ( add 4) B)27 ( add 5) C) 42 ( add 4,6,8,10,12 respectively) D) 21 ( add the first digit to second to get third and so on) E) 21( add 2,3 4,5,6) Hope it helps 1 Ashmit answered this see the pattern for the D 1+1 =2,2+1 =3,3+2 = 5,5+3=8,8+5 =13 , 13 +8 = 21 It is called fibbonacci pattern found by Leonardo Fibbonacci. 1
