Question

Pls answer both please....... it's urgent ​

Answer 1

Step-by-step explanation:

1)Let the three consecutive odd numbers are 2n+1,2n+3,2n+5

Their sum=2n+1+2n+3+2n+5=6n+9

Given that their sum=69

=>6n+9=69

=>6n=69-9

=>6n=69

=>n=60/6

=>n=10

2n+1=2(10)+1=20+1=21

The numbers are 21,23,25

The average of first and last numbers

=(21+25)/2

=>46/2

=>23

Option A

-----------------------------------------------------------------

2)Let the number thought by Hemanth=X

on multiply X with 13=13X

on adding 18 =13X+18

result=135

=>13X+18=135

=>13X=135-18

=>13X=117

=>X=117/13

=>X=9

Option B

---------------------------------------------------------------