Page 27 - Math Genius C2

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Predecessor and Successor

Three neighbourhood friends David, Rohan and Bharti are going home after school.

Their homes are near the school.

363 364 365

(Bharti’s house) (David’s house) (Rohan’s house)

david : My house number is 364. What are your house numbers Rohan and
Bharti?

rohan : My house is next to your house. So, my house number is 365.
Bharti : My house is just before your house. So, my house number is 363.

david : That means my house is between your houses. Bharti’s house is before

my house and Rohan’s house is after my house.
• Predecessor of a number means a number which is 1 less than the given number.

It is just before the given number. For example, 364 – 1 = 363

• Successor of a number means a number
which is 1 more than the given number. Fast Check
It is just after the given number. 1. Write the predecessor and the

For example, 364 + 1 = 365 successor of 200.

• A number between the two given numbers 2. Write 4 numbers just before
399 and 4 numbers just after it.
means a number which comes in the

middle of these numbers. For example, 363 364 365

Practice time 1F

1. Arrange the following numbers in ascending (increasing) order.

(a) 120, 266, 163, 75, 87 _______________________________________

(b) 215, 182, 276, 142, 45 _______________________________________

(c) 112, 110, 271, 243, 180 _______________________________________

(d) 190, 113, 145, 119, 172 _______________________________________

(e) 297, 263, 201, 146, 259 _______________________________________

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