In what ratio must a grocer mix two varieties of pulses costing ₹15 and ₹20 per kg, respectively, so as to get a mixture worth ₹18 per kg?

Simplify this:

25 ÷ 5 + 3 × 60 - (17 × 200 ÷ 40)

In an exam, 87% students passed and 2093 failed. What is the total number of students appearing in the exam?

If a sum of Rs. 3540 is divided in three parts in a ratio of 2 : 6 : 7, then the largest part will be:

If ₹3800 is distributed among A,B, C such that A : B = 1 : 2 and B : C = 3 : 5,the find the share of B.

If 45% of a number is 225, then find 7/20 of that number.

If the sum of fraction21/2 ,37/3 , is x and sum of the fraction20/6,16/3  is y then x – y = ? 

A box containing the denominations of one rupee coins, five rupee coins and ten rupee coins amount to Rs.1360. There are equal number of coins of all denominations ,Then the number of five rupee coins in the box?

The average weight of 6 members of a family is 25 kg, If one family member whose weight is 40 kg leave the group, then find the new average weight of remaining family members.

A company's annual income is Rs. 95,95,000 and be pays tax at the rate of 12 paisa in the rupee. Find his net income.

4^2x = 256 then the value of x is

A certain number of two digits is four times the sum of its digits and if 18 be added to it, the digits will be reversed. Find the number? 

The average of all prime numbers between 60 to 80 is:

A man travels a distance of 420 km by train which moves at the speed of 75 km/h and returns back by car at the speed of 50 km/h. Find his average speed for the whole journey.

The average of 50 observations is 36. It was found later that an observation 48 was wrongly taken as 23. Find the correct average of the observations.

The product of two even consecutive numbers is 168. Find the sum of numbers.

If k+(1/k)=2 , find the value of 8k × k × k

In an election the votes cast for two candidates were in the ratio 2 ∶ 9. If the successful candidate received 984321 votes, find the total voters polled.

The difference between 44 % of a number and 33% of the same number is 286. What is the 54% of that number?

The LCM of x and y is 2079 and their HCF is 27. If x = 189, what will be the value of y?