Exercise 1.5

1. The number of people who visited during common wealth games in New Delhi for the first four days was recorded as 15,290; 14,181; 14,235 and 10,578. Find the total number of people visited in these four days?

Instructions

To find the total number of people who visited during the first four days, we need to the number of visitors for each day.

Thus, Number of visitors = + + + =

Therefore, a total of 54,284 people visited during the first four days of the Commonwealth Games in New Delhi.

2. In Lok Sabha election, the elected candidate got 5,87,500 votes and defeated candidate got 3,52,768. By how many votes did the winner win the election?

Instructions

Votes for the elected candidate:

Votes for the defeated candidate:

Vote margin = - =

The elected candidate won by 2,34,732 votes.

3. Write the greatest and smallest 5-digit number formed by the digits 5, 3, 4, 0 and 7 and find their difference?

Instructions

Arrange the digits 5, 3, 4, 0, 7 in order to form the largest number i.e.

To form the smallest number, arrange the digits in ascending order while ensuring the number doesn't start with .

Thus, the smallest number is

Difference = - =

Thus, Greatest number: 75,430 while Smallest number: 30,457 with a difference of 44,973

4. A bicycle industry makes 3,125 bicycles each day. Find the total number of bicycles manufactured for the month of July?

Instructions

We know: Bicycles made per day = with Number of days =

Thus, total number of bicycles = 31 × 3125 = manufactured

The total number of bicycles manufactured in July is 96,875.

5. A helicopter covers 600 km in 1 hour. How much distance will it cover in 4 hours? Express your answer in meters.

Instructions

Given: Speed of the helicopter: 600 km per hour with time period: 4 hours

Distance = Speed × Time = × = km

Since 1 kilometer = meters, 2400 km = 2400 × = meters

The helicopter will cover 2,400,000 meters in 4 hours.

6. The total weight of a box of 5 biscuit packets of same size is 8kg 400 grams. What is the weight of each packet?

Instructions

Given: Total weight of 5 biscuit packets = 8 kg 400 grams

Convert the total weight into grams 1 kg = grams, so: 8 kg + 400 grams = grams + grams = grams

Since the total weight of 5 packets is 8400 grams, divide this by 5 to find the weight of one packet: 84005 grams = grams

Since grams = 1 kg: 1680 grams = kg grams

The weight of each packet is 1 kg 680 grams.

7. The distance between the school and the bus stop is 1 km 875 m. Everyday Gayatri walks both the ways to attend the school. Find the total distance she walked in 6 days?

Instructions

Given: Distance from school to bus stop: 1 km 875 m with Gayatri walks both ways (to and from school) each day. She does this for 6 days.

Convert the Distance to Meters: 1 km 875 m can be converted to meters: 1 km + 875 m = m + m = m

Since she walks both ways each day, the round trip distance is: × 1875 m = m

Calculate the Total Distance for 6 Days: m × = m

Since meters = 1 kilometer, 22500 m = 221000 = km

Gayatri walked a total distance of 22.5 km in 6 days.

8. The cloth required to make a shirt of school uniform for each boy is 1 m 80 cm. How many shirts can tailor stich using 40m. of cloth? How much cloth will be left?

Instructions

Convert the cloth required per shirt into meters: 1m + 80cm = + = m

Thus, Number of shirts = / = (Put the nearest whole number)

The tailor can stitch 22 shirts (since the number of shirts must be a whole number).

Calculate the cloth used for 22 shirts: × = m

Thus, leftover material = - = m

9. The cost of petrol is Rs. 60 per litre. A petrol bunk sells 750 litres of petrol on a day. How much money do they get at the end of the day?

Instructions

Total Cost =RateperlitreTotallitressold = × = Rs.

The petrol bunk gets Rs. 45,000 at the end of the day.

Chapter 1: Knowing Our Numbers

Glossary

Exercise 1.5

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Chapter 1: Knowing Our Numbers

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Glossary

Exercise 1.5