EASY
UGC NET Paper 1
IMPORTANT
Earn 100

During a summer vacation, of 20 friends from a hostel, each wrote a letter to each of all others. The total number of letters written was:

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Important Questions on Numerical Ability

MEDIUM
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 19
A farmer given 7 full, 7 half-full and 7 empty bottles to his three sons and asks them to share these among themselves such that each of them gets the same amount of honey and the same number of bottles. In how many ways can this be done? (Bottles cannot be distinguished otherwise, they are sealed and cannot be broken).
EASY
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 20
The maximum number of points formed by intersection of all pairs of diagonals of convex octagon is:
EASY
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 1
A purse contains 4 gold coins, 3 silver coins and another purse contains 6 gold coins and 2 silver coins. One coin is taken from one purse, the probability that it is a gold coin, is:
MEDIUM
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 2

The probability that a man will live 20 years more, is 14 and the probability that his wife will live 20 years more, is 13. Then the probability that none of them will be alive after 20 years, is:

EASY
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 3
In a box, there are 2 red, 3 black and 4 white balls. Out of these three balls are drawn together, the probability of these being of same colour is:
EASY
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 4

The probability that a company executive will travel by a bus is 2 over 3 and that he was travelling by a train is 1 fifth. The probability of his travelling by a train or a bus is?

MEDIUM
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 5
Box A contains 5 red balls, 3 green balls and 4 black balls. Box B contains 3 red balls, 4 green balls, 5 black balls. A ball is taken out at random and was found to be black. Find the probability that the black ball is from box A.
EASY
UGC NET Paper 1
IMPORTANT
General Aptitude (Theory and Practice)>Chapter 1 - Numerical Ability>Practice set>Q 6
A class of 24 boys was divided into two sub-section containing 12 boys each. What is the probability that the two shortest boys of the class are in different subsections, if all boys have different heights?