Quantitative Aptitude - Arithmetic Ability Questions

Two pipes can fill a cistern in 28 and 21 hours respectively and an another pipe can empty 30 gallons of water per hour. All the three pipes working together can fill the empty cistern in 84 hours. What is the capacity (in gallons) of the cistern?

The diameter of a circle is equal to the side of the square. What is the area of the square if the area of the circle is 49π sq cm?

The diagonals do not form at least two congruent triangles in a _____.

P, Q and R are channels which discharge solutions A,B and C respectively in a tank. When the tank is empty and all the three channels are opened what is the proportion of the solution C in the tank after 3 minutes, if the channels P, Q and R can fill the tank from empty to full in 30 minutes and 20 minutes and 10 minutes respectively when they are opened one at a time.

(−12)[11+7×(−3)]÷{}[413−(−3)×(−6)]=

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 29160, and Rs 31492.8 respectively, what is the rate of interest?

If tanθ = 724 then find the value of p such that tanθ - secθsinθ = -p28

Δ XYZ is right angled at Y. If m∠Z = 60°, then what is the value of (1/√2) Sec X?