**Category** > **WBCS Previous Years MCQs on General Science (Physics**

Q 1. If 𝑥 + 𝑦 = 3, 𝑥𝑦 = 2, then 𝑥 3 − 𝑦 3=?

Q 2. Which smallest number should be subtracted from 1936 so that on being divided by 9, 10, 15, every time the remainder is 7?

Q 3. 789.345 + 30.075 – 765.21 – 7.86 = ?

Q 4. 998 x 981 = ?

Q 5. √732108 = ?

Q 6. Which is the smallest 5-digit number which can be completely divided by 98?

Q 7. If 8 men can sow 80 hectares in 24 days, then how many hectares can 36 men sow in 30 days?

Q 8. The LCM of two numbers is 2310 and HCF is 30. If one of the numbers is 210, then what is the other number?

Q 9. In a 30 litre mixture of milk and water, the ratio of milk and water is 7:3. How much water should be added in the mixture so that the ratio of milk and water becomes 3:7?

Q 10. A and B can together do a work in 6 days. A can do it alone in 9 days. In how many days can B do it alone?