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Numerical Ability
Number System
Ray writes a two digit number. He sees that the number exceeds 4 times the sum of its digits by 3. If the number is increased by 18, the result is the same as the number formed by reversing the digits. Find the number.
Read Solution (Total 10)
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- 10x+y=4(x+y)+3;
10x+y=10y+x-18;
after solving these two eqn.s we will get x=3; y=5 i.e. 35 - 11 years agoHelpfull: Yes(33) No(2)
- go through options it is easy.
35=3+5=8
35=8(4)+3=35 - 11 years agoHelpfull: Yes(7) No(1)
- first equation is 10x+y=4(x+y)+3;
second is 10x+y+18=10y+x;
by solving these equations we obtain x=3 and y=5,
so the number is 10*3+5=35 - 11 years agoHelpfull: Yes(5) No(1)
- first eqn 10x+y-4(x+y)=3
second eqn 10x+y+18=10y+x
solving both eqn we get x=2 and y=3
so the number is 23 - 11 years agoHelpfull: Yes(3) No(9)
- we must go through substitution method
- 11 years agoHelpfull: Yes(3) No(0)
- 10*a+b=4(a+b)+3;
10a+b+18=10b+a; - 11 years agoHelpfull: Yes(1) No(0)
- 10x+y = 4(x+y) =3 ---(1)
10x+y+18 = 10y+x -----(2)
solve these equaations.. - 11 years agoHelpfull: Yes(1) No(0)
- 35 is the answer
- 11 years agoHelpfull: Yes(1) No(1)
- 4(x+y)+3=10x+y
also
10x+y+18=10y+x
hence solving we get 35 - 9 years agoHelpfull: Yes(0) No(0)
- 352849113670
it can be obtained by adding one previous term i.e. first +second=third term, second+third=fourth and so on......... - 9 years agoHelpfull: Yes(0) No(0)
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