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Operations on Integers

The units dig...

Question

The units digit of the result of the expression (25×25) + (21×21) + (12×12) is

A

0

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B

1

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C

4

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D

8

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Solution

The correct option is A 0

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Similar questions

Express each of the following in percent.

1) \frac{2}{3}

2) \frac{1}{25}

3) \frac{6}{25}

Q. The H.C.F. of

\frac{9}{10}

\frac{12}{25}

\frac{18}{35}

\frac{21}{40}

2 \frac{1}{3} + 1 \frac{1}{4} + 2 \frac{5}{6} + 3 \frac{7}{12}

Q. The pair of two-digit numbers 12 and 63 has the interesting property that if the product expression

12 \times 63

is read in reverse order

36 \times 21

, the two product expressions are equal, i.e.

12 \times 63 = 36 \times 21

. How many pairs of two-digit numbers with this property are there in which one of the numbers in the pair is greater than 20 and less than 30, and the units' digit of the other number in the pair is an odd prime?___

\frac{9}{10}

\frac{12}{25}

\frac{18}{35}

\frac{21}{40}

:

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