ID 687

ID 692

ID 696

ID 698

ID 699

ID 700

ID 701

ID 705

Identify the graph that best represents the relationship between the number of liters, N, of gasoline purchased at $1.19 a liter, and the total cost of the gasoline C.

ID 716

ID 725

ID 728

ID 732

ID 737

ID 749

ID 752

ID 753

ID 754

ID 771

ID 1267

The number in each square is obtained by adding the numbers connected to it from the row below.

For example, 3 + 5 = 8

Find the value of X.

ID 1668

The girl is 10% taller than the boy.

In ten years, he will be 50% taller than he is now and the girl will be 10% smaller than the boy.

How much faster will the boy be growing than the girl during these ten years?

ID 1785

ID 1863

90% of 90 girls and 80% of 110 boys have shown up in the concert hall on time.

How many children are late?

ID 1961

In Morse code, each symbol is either a dot or a dash.

What is the best estimate of the average number of symbols in the set shown at the right?

ID 2019

ID 2176

92% of 900 employees of a company arrive at the workplace on time on Friday.

There are 500 female employees in the company and 94% of them have arrived at the workplace this Friday on time.

What is the percentage of the men who are late?

ID 2998

ID 3005

How is

(1 x 10^{5}) + (2 x 10^{4}) + (3 x 10^{3}) + (4 x 10^{2}) + (5 x 10^{1}) + (6 x 10^{0}) + (7 x 0)

written in standard form?

ID 3071

ID 3094

ID 3108

ID 3137

Find the sum of all the elements of this finite geometric sequence:

1, 2, 4, 8, 16, 32, 64, . . . , 2048.

ID 3208

ID 3228

Two candles are of the same height.

One burns in three hours, while the other burns in five hours.

When is one twice the height of the other?

ID 3248

In Morse code, each symbol is either a dot or a dash.

How many different sequences of 6 symbols are possible?

ID 3399

You can purchase or rent a car.

The car is available at a rental fee of $250 per day (all inclusive).

Purchasing the car costs you $40,000 for the investment and $50 per day.

After how many days would the cost of renting and purchasing be equal?

ID 3400

Choose the answer without using a calculator.

I multiply together the following numbers:

10, 11, 12, 13, 14,15, 16, 17, 18, 19, 20, and 21

How many zeros are at the end of the product?

ID 3659

ID 3862

A report said that for every 100 babies born in a county, there were 12 more girls than boys.

What is the highest expected number of girls in a class of 25 children?

ID 3866

A grocer divides 172kg of potatoes into 5kg and 2kg bags.

If the grocer always produces twice as many small bags as big bags, how many small bags does he use?

ID 3900

Which number between 40 and 50 can be expressed both as the sum of two consecutive integers and as the sum of three consecutive integers?

ID 3943

It takes Jim 6 hours to paint a fence and John 4 hours to paint the same fence.

How much time will it take them to paint the fence if they both work together?

ID 3965

A theater sells 150 tickets for a total of $2010.

Children's tickets are sold for half-price, $10.

How many half-price tickets were sold?

ID 4038

ID 4054

ID 4137

A driver's odometer reads 0515 km and the clock reads 05:15 before leaving on a trip.

At the end of the trip, the odometer reads 1505 km and the clock 15:05.

Estimate the average speed of the car.

ID 4205

There is an equal number of boys and girls.

Share $10 among them so that each girl gets $1 more than each boy.

How much does each girl get?

ID 4337

A tennis ball keeps on bouncing back to half of the height from which it is dropped.

Calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced five times?

ID 4438

In a summer camp, the ratio of people was 11 : 12 : 15 for instructors, boys, and girls.

Calculate how many girls were there if the total number of people was 798.

ID 4496

ID 4769

ID 4788

ID 4895

ID 4915

ID 4928

If 300 people occupy 5/7 of the seats in a concert hall, how many people would occupy 95 percent of the seats in the hall?

ID 5158

Brad has as many sisters as brothers.

His sister Sue has twice as many brothers than sisters.

How many children are there in the family?

ID 5175

The King of a far away land needs to adjust the temperature of the shower all by himself. The inconsiderate servant who normally performs this duty has broken his leg and is therefore unavailable. (The King has failed to realise that kicking the servant caused the servant to trip, breaking his leg because of the fall!)

The King requires a flow rate of 4 liters per minute of 40°C water to be derived from two calibrated hot and cold water taps. The cold water is at 10°C and the hot water is at 50°C. The mixing unit does not change the calibration of the taps or allow heat to be lost from the water.

What settings are required on the taps?

The problem was suggested by Leslie Green

ID 5199

Positive integers a, b, c, and d are such that

a + b + c + d = 20

Find the maximum possible value of their product.

ID 5235

A bottle that fully contains juice weighs 1000 grams.

The bottle with half of the juice weighs 600 grams.

What is the weight of the empty bottle?