Find out the wrong number in the series. 196, 169, 144, 121, 100, 80, 64

Three numbers which are co-prime to each other are such that the product of the first two is 551and that of the last two is 1073.

The sum of the three numbers is:

A man bought 20 shares of Rs. 50 at 5 discount, the rate of dividend being 131/2. The rate of interest obtained is:

How many two-digit numbers satisfy this property.: The last digit (units digit) of the square of the two-digit number is 8?

A and B can together finish a work 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work.

In how many days A alone can finish the work?

In each of the following questions, a question is asked and is followed by three statements.

- The answer number bearing the statements, which can be dispensed with, if any, while answering the questions your answer.

Two, trains, one from Howrah to Patna and the other from Patna to Howrah start simultaneously. After they meet, the trains reach their destinations after 9 hours and 16 hours respectively.

The ratio of their speeds is:

The least number which when divided by 5, 6, 7 and 8 leave a remainder 3, but when divided by 9 leaves no remainder, is:

Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax-free items?

The ratio of the number of boys and girls in a college is 7: 8. If the percentage increase in the number of boys and girls be 20% and 10% respectively, what will be the new ratio?

What percentage of numbers from 1 to 70 have 1 or 9 in the units digit?

Mr. Gupta borrowed a sum of money on compound interest. What will be the amount to be repaid if he is repaying the entire amount at the end of 2 years?

I. The rate of interest is 5 p.c.p.a.

II. Simple interest fetched on the same amount in one year is Rs. 600.

III. The amount borrowed is 10 times the simple interest in 2 years.

The true discount on Rs. 1760 due after a certain time at 12% per annum is Rs. 160. The time after which it is due is:

Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:

A, B, and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?

A boat having a length of 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:

The cost price of 20 articles is the same as the selling price of x articles. If the profit is 25%, then the value of x is:

A is 30% more efficient than B. How much time will they, working together, take to complete a job which A alone could have done in 23 days?

In a 300 m race A beats B by 22.5 m or 6 seconds. Bs time over the course is:

In a 200 meters race A beats B by 35 m or 7 seconds. As time over the course is:

A can run 22.5 m while B runs 25 m. In a kilometer race B beats A by:

The angle of elevation of a ladder leaning against a wall is 60º and the foot of the ladder is 4.6 away from the wall.

The length of the ladder is:

Two stations A and B are 110 km apart on a straight line. One train starts from A at 7 a.m. and travels towards B at 20 kmph. Another train starts from B at 8 a.m. and travels towards A at a speed of 25 kmph.

At what time will they meet?

4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?

Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?