Mathematics and Physics Quiz

A bag containing only coins has a monetary value of 140$ , the bag contains coins of 1$,2$ and 5$ in the ratio of 2:3:4 then what is the percentage of the total value of 2$ coins in the bag?

In January 2023, the price of 1 Bitcoin was $20,000. Over the next six months, its price increases every month by 10% of its price at the beginning of that month. What is the approximate price of 1 Bitcoin (rounded to the nearest hundred dollars) at the end of six months?

A invested 20000 in a startup along with B . B invested 10000 in the starting and 5000 after 6 months . After a year they received a profit of a total of 7800 , find the share of B in the profit?

If a number leaves a remainder 3 when divided by 7 , what will be the remainder when the number is again divided by 7 again after adding 11 to it ?

If a 7 digit number 384x7y2 is divisible by 11 then what is the minimum value of (x+y)?

Suppose a particle is moving in a straight line with v(t)= 9-3t+t^2 m/s , then what is the displacement covered when the particle starts de-accelerating? The initial position of the particle was x=0.

A thief stole some jewellery from a woman on the street and ran away on the same street on a car with a speed of 4m/s (suppose street in a straight line). The woman called the police but the police car reached the point after 15min. Police started to chase the thief with velocity 10m/s , then in how much time will police be able to catch up with the thief?

If w:x= 1:3 , x:y=3:4 , y:z= 5:7 then find z:w ?

Mean proportion of ( and ) ?

A student has spent 20% of his pocket money on chocolates , 30% of the rest on the notebook and now he has 112 Rs in his pocket out of which he will spend 12 Rs on the taxi fare . Then what was the pocket money when he started from home to school?