Solve the question on your notebook and check it by clicking (Answer and Explanation) below question.
How many terms are there in 2,4,8,16,....,1024
It is a GP. with r = 2, ie
21,22,23...
If number of terms is n. Then,
2×2n-1=1024
=>
2n-1=512
or
2×2n-1=29
so n-1 = 9 => n = 10
Which of the following is a prime number
What is the largest 4 digit number exactly divisible by 88
Largest 4 digit number is 9999
After doing 9999 ÷ 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88
= 9999 - 55 = 9944
What is the unit digit in (6324)1797×(615)316×(341)476
What is the unit digit in
(6324)1797×(615)316×(341)476
Which is smallest prime number
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