Page 27 - Math Genius C5

E:\Working\Orange_Education\Math_Genius_5\Open_Files\CHAP_01
\ 08-Oct-2025 Bharat Arora Proof-9 Reader’s Sign _______________________ Date __________

Critical Thinking
Mental Maths
Tick () the correct option.
1. The number of zeros in 10 million is:

( a) 7 (b) 10 (c) 9 (d) 8

2. Which of the following numbers is the greatest?

( a) 9,87,654 (b) 98,76,543 (c) 9,78,654 (d) 9,87,645

3. How many thousands are there in 12,34,000?

( a) 124 (b) 123 (c) 1240 (d) 1234

4. Which of the following numbers is closest to 5 million?
( a) 49,99,999 (b) 500,000 (c) 50,000 (d) 5,999,999

5. 80 lakh = ________ million
( a) 8 (b) 80 (c) 800 (d) 100

www
MAths connect Cross-Curricular Learning

The rapid growth in the population of India is putting immense pressure on resources and
is contributing to environmental degradation, poverty and social unrest. The government
has taken some steps to address this problem, but much more needs to be done. As
per the Census of 2011, the populations of four metropolitan cities are given below:

1. Mumbai – 12,478,447 2. Delhi – 11,034,555

3. Bengaluru – 8,443,675 4. Hyderabad – 6,809,970
Arrange the cities in ascending and descending order according to their population.

Find the least and most populated cities in our country with the help of the internet.
Also, write the populations of these cities in words.
Take a blank political map of India and colour these cities on it.

maths fun Logical Thinking

A boatman wants to cross a river in a boat. He has to take a lion, a
sheep, and a bundle of grass with him. He can take one of them at
a time. If the sheep and grass are left on the shore, the sheep will eat the grass.
If the sheep and lion are left on the shore, the lion will eat the sheep. How can
the boatman take the lion, sheep, and grass across the river in the minimum
number of trips? Write the number of trips in Roman numerals as well.

Mathematics-5 2525
Mathematics-5