For the following questions answer them individually
D, E, F are midpoints of the sides BC, CA, AB of a ∆ABC. If area of ∆ABC is 20 cm², then find area of the trapezium FBCE.
If '+' means 'x', '-' means '+', 'x' means '÷' and '÷' means '-' , then, 8 x 4 - 6 ÷ 3 + 1 = ?
A grandfather and his granddaughter have their ages in the ratio 9 : 2. Sum of their ages is a prefect square. The difference in their ages is a multiple of 11. What are their ages?
Rahul ranked 16th from the top and 29th from the bottom among those who passed the examination. Six boys did not participate in the examination and five failed. How many boys were there in the class?
Pipe P is twice as fast as Q, and Q is twice as fast as R. Find the ratio of the time taken by P, Q and R to fill a
cistern.
