The elements calcium, strontium and barium were put in one group or family on the basis of their similar properties . Which were those similar properties ?
Why does hydrogen show properties similar to both alkali metals and halogens?
Lithium , sodium and potassium elements were put in one group on the basis of their similar properties. What are those similar properties ?
A die is thrown twice. Each time the number appearing on it is recorded. Describe the following events: A= both numbers are odd. B= both numbers are even. C= sum of the numbers is less that 6. Also, find AuuB ,AnnB ,AuuC ,AnnC . Which pairs of events are mutually exclusive?
Catherine threw a dice 40 times and noted the number appearing each time as shown below : Make a table and enter the data using tally marks. Find the number that appeared.(a) The minimum number of times (b) The maximum number of times(c) Find those numbers that appear an equal number of times
Two tankers contain 850 litres and 680 liters of kerosene oil Respectively. Find the maximum capacity of a container which can measure the kerosene oil of both the tankers when used an exact number of times.
If a die is rolled twice, what is the probability that it will land on an even number both times?
A positive number is 5 times another number. If 21 is added to both the numbers, then one of the new numbers becomes twice the other new number. What are the numbers?
If two dice are rolled thrice, then the mean of X where X denotes the number of times even numbers obtained on both dice is
If the mass of the sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct?
