Test Index

CTET Paper II (Mathematics and Science) 5 Jan 2022 Solved Paper

Question : 33 of 150

Marks: +1, -0

The unit digit of (233 + 373) is

Solution:

Concept:

Find the unit digit of each cube separately, then add the unit digits.

Explanation:

The expression is

23^3 + 37^3

Unit digit of

23^3

is same as

3^3 = 27

, so unit digit is

7

Unit digit of

37^3

is same as

7^3 = 343

, so unit digit is

3

Add these unit digits:

7 + 3 = 10

The unit digit of

10

0

Thus, the unit digit of the sum is

0

Answer:

C. 0

Go to Question:

Prev Question

Next Question