When 721 + 722 + 723 + 724 is divided by 25 the remainder is: 5 17 7 0 Given, 7

CuriousTab

CuriousTab

Home Aptitude

Discussion

Home ‣ Aptitude ‣ Simplification See What Others Are Saying!

Question
When 721 + 722 + 723 + 724 is divided by 25 the remainder is:
Options
A. 5
B. 17
C. 7
D. 0

Correct Answer

0

Explanation

Given, $7^{21}$ + $7^{22}$ + $7^{23}$ + $7^{24}$

$7^{21}$ (1 + 7 + 49 + 343)
$7^{21}$ (400)

Now, 400 is divisible by 25. The remainder will be 0

Tags:

More questions

1.
Shankara buys a watch for Rs. 1,950 in cash and sells it for Rs. 2,200 at a credit of 1 year. If the rate of interest is 10% per annum, he _____ :
Options
A. gains Rs. 55
B. gains Rs. 50
C. loses Rs. 30
D. gains Rs. 30

5.
Rajan sold an articles for ? 6000 at a loss of 25%. Find the cost price.?
Options
A. ? 7500
B. ? 7200
C. ? 8000
D. ? 8500

6.
In which of the following cases, A = B?
Options
A. A = {12, 14, 16}, B = {16, 18, 20}
B. A = ?, b = {}
C. A = {x: x ? W and x < 1}, B = ?
D. A = {x: x is a day of the week beginning with S}, B = {Sunday}

8.
If two parallel lines are intersected by a transversal, then the bisectors of the two pairs of interior angles enclose a:
Options
A. Trapezium
B. Rectangle
C. Square
D. circle

10.
The length of minute hand of a wall clock is 7 cms. The area swept by minute hand in 30 minutes is?
Options
A. 147 sq. cm
B. 210 sq. cm
C. 154 sq. cm
D. 77 sq. cm

Comments

More in Aptitude: