Ans 1:
Class : Class 9
I would recommend the following books to crack olympiads. This helped me to get good marks above 90%
1.Arihant olympiad books
2. MTG books
Other than that, you can also use internet sources and I recommend you to use Khan Academy.
Most of the questions are from NCERT books and HOTS are from NCERT Exemplar.
Hope this helps.
Post Your Answer
Post Your Answer
Post Your Answer
is a living thing because ______.
Post Your Answer
Post Your Answer
Ans 19:
Post Your Answer
Post Your Answer
Ans 2:
Class : Class 6
its wrong
a perfect number is when all the factors add up to the number itself, not double the number.
Ans 7:
Class : Class 6
I said statement 2 is false but it came wrong and when I referred my book and googled it it showed :a perfect number is a number that is equal to the sum of its proper divisors. for eg. 6 3 2 1=6 hence 6 is a perfect number
Ans 8:
Class : Class 7
The answer is absolutely wrong. A perfect number in which the sum of it's factors is equal to the number.
Ans 13:
Class : Class 9
it is wrong.a perfect number is the one whose factors,when added ,gives the same numberhence,it is wrong
Ans 16:
Class : Class 6
OHHHH I GET IT
6 is a perfect number because 1,2, and 3 (its factors other than itself) Add up to it. But the people that made the test included 6 as well, which was wrong but atleast we know why they did that now
Basically the way your supposed to do it is to add all the factors of a number other than itself, but the people that made the test added itself, which is why its double.
1+2+3=6
1+2+3+6 = 12 = double of 6