Question

please solve the question no 10 & 12

Answer 1

the answer will be off into one by two into 5 is equal to 5 into 5

Answer 2

A10==>

Let the units place be x, then the tens digit be 7 - x


Number formed by these digits = 10 x Tenss digit+Units digit
=> 10(7-x)+x
=>70 x -10 x +x
=>70 x -9x

When the digits are interchanged than,
Tens digit= x
Units digit = 7-x
The new no. formed = 10x + 7-x
= 9 x +7
given that the no. exceeds by 27
New no. - Given no.
=>9x +7 - (70-9x)=27
=>9 x + 7 - 70 + 9x =27
=>18x -63= 27
=>18 x = 63+27
=>18 x= 90
=>x = 90/18
=>x=5
The number= 70- 9x 
=> 70-45
=> 25

Therefore, the number is 25


A12==>
Let sanjay  bro's present age= x
Sanjaya's age= x/2
after 6 years, sanjaya bro's age will be = x+6, Sanjay will be = x/2+6
as per question
x/2+6=3/5(x+6)
=>x/2+6=3x/5+18/5
=>6-3.6=3x/5-x/2
=>2.4=x/10
=>x=24
Sanjay's bro is 24 years old and sanjay is 12 years old.