A class has three groups A, B and C. One student from A and two students from B are shifted to C. What happens to the average weight of all students in the class?

The average age of a teacher and three students is 20 years. All three students are of the same age. The teacher is 20 years older than each student. Find the teacher's age.

A batsman's average score after 50 innings was 46.4. After 60 innings, his average increased by 2.6. What was his average score in the last 10 innings?

The recurring decimal representation 1.272727... is equivalent to:

Which one of the following will have minimum change in its value if 5 is added to both numerator and denominator of the fractions?

For what value of n, the sum of digits in the number (10^n + 1) is 2?

Let XYZ be a three-digit number, where (X + Y + Z) is not a multiple of 3. Then (XYZ + YZX + ZXY) is not divisible by:

A digit n > 3 is divisible by 3 but not divisible by 6. Which one of the following is divisible by 4?

The minimum number of points of intersection of a square and a circle is 2.

2. The maximum number of points of intersection of a square and a circle is 8.

Which of the above statements is/are correct?

Let x, y be the volumes; m, n be the masses of two metallic cubes P and Q respectively. Each side of Q is two times that of P and the mass of Q is two times that of P. Let u=m/x and v=n/y. Which one of the following is correct?

What is the least four-digit number when divided by 3, 4, 5 and 6 leaves a remainder 2 in each case?

A bottle contains 20 litres of liquid A. Four litres of A are removed and replaced by 4 litres of liquid B. The operation is repeated once more. What is the final ratio of liquid A to liquid B?

A simple mathematical operation in each number of the sequence 14, 18, 20, 24, 30, 32, ... results in a sequence with respect to prime number. Which one of the following is the next number in the sequence?

A shop owner offers the following discount options on an article to a customer:

1. Successive discounts of 10% and 20%, and then pay a service tax of 10%.

2. Successive discounts of 20% and 10%, and then pay a service tax of 10%.

3. Pay a service tax of 10% first, then successive discounts of 20% and 10%.

Which one of the following is correct?

In adult population of a city, 40% men and 30% women are married. What is the percentage of married adult population if no man marries more than one woman and no woman marries more than one man; and there are no widows and widowers?

As a result of 25% hike in the price of rice per kg, a person is able to purchase 6 kg less rice for Rs. 1,200. What was the original price of rice per kg?

How many different 5-letter words, meaningful or otherwise, can be formed using all the letters of DELHI, such that every word starts with D and ends with I?

A person bought a car and sold it for ₹3,00,000. If he incurred a loss of 20%, then how much did he spend to buy the car?

What is the remainder when 51 × 27 × 35 × 62 × 75 is divided by 100?

How many pairs of natural numbers are there such that the difference of whose squares is 63?

A car travels from X to Y at speed $v$, returns at $2v$, again travels from X to Y at $3v$, and returns at $4v$. Where does the average speed for the entire journey lie?

X can complete 20% of a work in 8 days, while Y can complete 25% of the same work in 6 days. If they work together, in how many days will they complete 40% of the work?

Consider the following arrangement that as some missing letters: abab_b_bcb_dcdcded_d the missing letters which complete the arrangement are

A family of two generations consisting of six numbers P, Q, R, S, T and U as three males and three females. There are two married couples and two unmarried siblings. U is P's daughter and Q is R's mother-in-law. T is an unmarried male and S is a male. Which one of the following is correct?

If in a particular year 12th January is a Sunday, then which one of the following is correct?

The letters from A to Z are numbered from 1 to 26 respectively. If GHI = 1578 and DEF = 912, then what is ABC equal to?

What is the missing term @ in the following?

ACPQ: BESU: MNGI: @

Consider the following data:

For which period was the natural growth rate maximum?

A man walks down the backside of his house straight 25 meters, then turns to the right and walks 50 meters again; then he turns towards left and again walks 25 meters. If his house faces to the East, what is his direction from the starting point?

A is 16th from the left end in a row of boys and V is 18th from the right end. G is 11th from A, towards the right and 3rd from V, towards the right ends. How many boys are there in the row?

Consider the following sequence of numbers: 5 1 4 7 3 9 8 5 7 2 6 3 1 5 8 6 3 8 5 2 2 4 3 4 9 6

How many odd numbers are followed by the odd number in the above sequence?

Two Statements are given followed by two Conclusions:

Statements: All cats are dogs.

All cats are black.

Conclusion-I: All dogs are black.

Conclusion-II: Some dogs are not black.

Which of the above Conclusions logically follows/follow from the two given Statements, disregarding commonly known facts?