What is the next number of the following sequence 1,4,9,7,7,9,......

M4maths Previous Puzzles

08 Jul 2013 Sequence

What is the next number of the following sequence
1,4,9,7,7,9,......

OPtion

1) 1
2) 4
3) 9
4) 10
5) 13
6) 16
7) 17
8) 19
9) 21
10)None of these

Solution

1^2=1=1+0=1
2^2=4=4+0=4
3^2=9=9+0=9
4^2=16=1+6=7
5^2=25=2+5=7
6^2=36=3+6=9
7^2=49=4+9=13
option 5

Correct Option: 5 Best Solution (10)

Amit kumar   11 years AGO

1^2=1
2^2=4
3^2=9
4^2=16 then add digits 1+6=7
5^2=25 then add digits 2+5=7
6^2=36 then add digits 3+6=9
7^2=49 then add digits 4+9=13

Like? Yes (15) | No (3)  

M.Gautam   11 years AGO

1,4,9 then 1+6=7 then 4+3=7 then 9-0=9 so it becomes
1,4,9,7,7,9 similarly again 7+6=13 & it continues in the same way so according to me 13 is the answer

Like? Yes (3) | No (1)  

MP    11 years AGO

sum of digits of perfect squares.
1
4
9
16.....7
25..7
36....9
49....13

Like? Yes (2) | No (1)  

Anil Kumar Bharti   11 years AGO

Exp:
(1, 4, 9), (7, 7, 9)
1+6=7, 4+3=7, 9+0=9 similarly....
7+6=13 Ans

Like? Yes (2) | No (2)  

Udhaya kumar   11 years AGO

7 ^ 2 ......49....4+9......13
Answer is 13.......

Like? Yes (2) | No (2)  

Thaiyalnayaki   11 years AGO

1^2=1
2^2=4
3^2=9
4^2=16=1+6=7
5^2=25=2+5=7
6^2=36=3+6=9
7^2=49=4+9=13

Like? Yes (1) | No (2)  

Niraj   11 years AGO

1^2=1
2^2=4
3^2=9
4^2=16=1+6=7
5^2=25=2+5=7
6^2=36=3+6=9
7^2=49=4+9=13

Like? Yes (1) | No (2)  

Adarsha Upadhya   11 years AGO

given 1,4,9,7,7,9
1---> 1
4--->2^2
9--->3^2
7--->4^2=16=1+6=7
7--->5^2=25=2+5=7
9--->6^2=36=3+6=9
next no is 13---->7^2=49=4+9=13

Like? Yes (2) | No (3)  

nani rajesh   11 years AGO

option is 5

Like? Yes (1) | No (2)  

raviteja   11 years AGO

1+6=7
7+6=13

Like? Yes (1) | No (2)