निम्नलिखित में से

Sandeep can solve 20 questions in 1 hour. If he decreased his efficiency by 20%, then how much time would he take to solve the same number of questions?

Find the remainder when (2¹⁰⁰ + 3¹⁰⁰) is divided by 5.

Two numbers add up to 18, and the sum of their reciprocals is 5/2. Calculate the square of the product of the two numbers.

Find the value of 6 + 66 + 666 + 6666 +hellip;hellip;hellip;hellip;.. + n terms.

1. `(2)/(3) ((10 xx (10^(n)- 1))/9 - n)`

2.

Find the value of 'a' in the given data if the mean of the given data is 16.

10, 12, 18, 20, 15, 17, a, 14, 13, 19

Which of the following number is rational number?