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Required number = x =`(17-x)/(21-x)=1/2` ⇒ 34 - 2x = 21 - x ⇒ 2x - x = 34 - 21 ⇒ x = 13
nth term of an AP is 0. If AP is 63, 60, 57…, then find the value of n.
24, 29, 62, ?, 758, 3791
...‘479385A267’ is ten-digit number which is divisible by 9, what is the value of ‘A’?
How many three digit numbers are divisible by 5?
Mean of a grouped data calculated using direct method, assumed mean method or step deviation method:
What is the median of the following list of numbers: 5, 3, 6, 9, 11, 19,12,20, and 1?
Meera buys a laptop and sells it to Sneha at a profit of 25%. Sneha then sells it to Tushar at a loss of 10%. If Tushar buys the laptop for Rs. 36,450, ...
The sum to n terms of the series 1 + 1 + 3 + 1 + 3 + 5 + 1 + 3 + 5 + 7 …………………… is
The arithmetic mean and geometric mean of two numbers are 7 and 2√10 respectively, then find the numbers.
21 is divided into three parts which are in arithmetic progression (A.P.) in such a way that the sum of their square is 179. Find the smallest part.
