Page 180 - Math Genius C2

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\ 26-Sep-2025 Bharat Arora Proof-10 Reader’s Sign _______________________ Date __________

Let us understand this with the calendar of the year 2026.

2026 CAlendAr

January February March April
Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa
1 2 3 1 2 3 4 5 6 7 1 2 3 4 5 6 7 1 2 3 4
4 5 6 7 8 9 10 8 9 10 11 12 13 14 8 9 10 11 12 13 14 5 6 7 8 9 10 11
11 12 13 14 15 16 17 15 16 17 18 19 20 21 15 16 17 18 19 20 21 12 13 14 15 16 17 18
18 19 20 21 22 23 24 22 23 24 25 26 27 28 22 23 24 25 26 27 28 19 20 21 22 23 24 25
25 26 27 28 29 30 31 29 30 31 26 27 28 29 30
May June July August
Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa
31 1 2 1 2 3 4 5 6 1 2 3 4 30 31 1
3 4 5 6 7 8 9 7 8 9 10 11 12 13 5 6 7 8 9 10 11 2 3 4 5 6 7 8
10 11 12 13 14 15 16 14 15 16 17 18 19 20 12 13 14 15 16 17 18 9 10 11 12 13 14 15
17 18 19 20 21 22 23 21 22 23 24 25 26 27 19 20 21 22 23 24 25 16 17 18 19 20 21 22
24 25 26 27 28 29 30 28 29 30 26 27 28 29 30 31 23 24 25 26 27 28 29
September October november december

Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa Su M t W th F Sa
1 2 3 4 5 1 2 3 1 2 3 4 5 6 7 1 2 3 4 5
6 7 8 9 10 11 12 4 5 6 7 8 9 10 8 9 10 11 12 13 14 6 7 8 9 10 11 12
13 14 15 16 17 18 19 11 12 13 14 15 16 17 15 16 17 18 19 20 21 13 14 15 16 17 18 19
20 21 22 23 24 25 26 18 19 20 21 22 23 24 22 23 24 25 26 27 28 20 21 22 23 24 25 26
27 28 29 30 25 26 27 28 29 30 31 29 30 27 28 29 30 31

Observe that:
There are 12 months in a year. January is Knowledge Desk

the first month and december is the last Once in 4 years, February has 29 days.
month. Such a year is known as a leap year.
There are 7 months which have 31 days The earth revolves around the sun

each and 4 months which have 30 days taking about 365 days and 6 hours
which make up a year. In four years,
each. the extra 6 hours each make 6 × 4 =

February is the shortest month of the year 24 hours. That is why a day is added in
with 28 days. the month of February and thus, a leap
year has 366 days.
A year has 365 days.

Fast Check Think Tank Critical Thinking

1. Name the months which have 1. If the present month is July,
exactly 30 days. _______________ last month was ________ and the
2. Name the months which have next month will be ________.
exactly 31 days. _______________ 2. Was the year 2024 a leap year? _____

teacher’s Demonstrate how to know the number of days in a month of the year using the knuckles and grooves on
tip hands.

178 Mathematics-2