The interest equal to the product of principal rate and time is called:
💡 Explanation: Simple Interest = Principal × Rate × Time (I = PRT).
The distance around a 2-dimensional closed shape is called:
💡 Explanation: Perimeter is the total distance around the boundary of a 2-dimensional shape.
The endpoints of the diameter of a circle are A(-5 6) and B(3 -4). The centre of the circle is located at:
💡 Explanation: Centre = midpoint of AB = ((-5+3)/2, (6+(-4))/2) = (-2/2, 2/2) = (-1, 1).
The sum of the ages of Saeed and his son is 60. If Saeed's age is double his son's age then Saeed's age is:
💡 Explanation: Let son = x then Saeed = 2x. So x + 2x = 60 → x = 20. Saeed = 2×20 = 40.
The price of sugar is 100% more than the price of wheat. The ratio of their prices is:
💡 Explanation: If wheat = 1 then sugar = 1 + 100% of 1 = 2. Ratio of sugar to wheat = 2:1.
In a bag the ratio of red to blue marbles is 3:2. If there are 21 red marbles then blue marbles are:
💡 Explanation: If 3 parts = 21 then 1 part = 7. Blue marbles = 2 parts = 14.
20% of the price of a book is 120. The total price is:
💡 Explanation: If 20% = 120 then 100% = 120 × (100/20) = 600.
If a pizza is divided into 10 equal slices and you eat 4 slices the percentage of the pizza you did not eat is:
💡 Explanation: You ate 4/10 = 40% so you did NOT eat 100% - 40% = 60%.
The smallest number which is divisible by all the given numbers is called:
💡 Explanation: LCM (Least Common Multiple) is the smallest number that is divisible by all given numbers.
A telescope uses:
💡 Explanation: A refracting telescope uses two convex lenses - an objective lens and an eyepiece lens.
According to Bohr's model electrons revolve in:
💡 Explanation: Bohr's model proposed that electrons revolve in fixed stationary circular orbits around the nucleus.
At what temperature reading do the Fahrenheit and Celsius temperature scales coincide?
💡 Explanation: The Fahrenheit and Celsius scales meet at -40 degrees (-40°C = -40°F).
The energy possessed by a body due to its motion is:
💡 Explanation: Kinetic energy is the energy an object possesses due to its motion (KE = ½mv²).
According to Rutherford's model most of the mass of an atom is concentrated in:
💡 Explanation: Rutherford's model proposed that almost all the mass of an atom is concentrated in a tiny dense nucleus.
The binary addition of two high bits (1+1) results:
💡 Explanation: In binary 1+1 = 10 (which is 2 in decimal). The result is 0 with a carry of 1.