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Write the first and last number of the tenth line

Asked by namradalachu4 | 25th Jun, 2019, 05:49: AM

Expert Answer:

The first numbers follow a sequence
1,  1+1=2,   2+2=4,    4+3=7,    7+4=11,    11+5=16,    16+6=22, ...... and so on
It can also written as
1 cross times 1 plus 0
2 cross times 1 plus 0
3 cross times 1 plus 1
4 cross times 1 plus 3
5 cross times 1 plus 6
6 cross times 1 plus 10
7 cross times 1 plus 15
8 cross times 1 plus 21
9 cross times 1 plus 28
10 cross times 1 plus 36 space equals space 46
So, the first number on the tenth line will be 46 and the last number will be 55.

Answered by Renu Varma | 25th Jun, 2019, 11:47: AM

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