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