Answer: Option B. -> 100 : B We have to find the unknown value which gets multiplied by 0.389 and gives 38.9 →0.389×x = 38.9 => x = 38.9÷0.389 => x = 38.90.389 => x = 100
Question 26. The sum of two numbers is 10. If one number is 2.75, then the other number is ______ .
Answer: Option D. -> 504.04 : D We have to do the addition. 500+4+4100=500+4+0.04 500+4+0.04¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯504.04––––––––––– ∴500+4+4100=504.04
Answer: Option B. -> 311 : B 33121=/11×3/11×11=311
Question 30. Arun reads 38th of a book in the morning and 14th of the same book in the evening. What fraction of the book still remains to be read by Arun?
Answer: Option C. -> 38 : C Fraction of book read by Arun =38+14=38+1×24×2(LCM of 8 and 4 is 8)=3+28=58 ∴ Fraction of book remaining will be =1−58=8−58=38 ∴ Fraction of book remaining will be 38.
