Ques:- A prime number N, in the range 10 to 50 remains unchanged when its digits are reversed. The square of such a number is
A. 1936
B. 1089
C. 484
D. 121
Ques:- The smallest number that must be added to 803642 in order to obtain a multiple of 11 is
A. 1
B. 4
C. 7
D. 9
Ques:- What percentage of numbers from 1 to 70 have squares that end in the digit 1?
A. 1
B. 14
C. 20
D. 21
Ques:- Find out the wrong number in a given series.
644, 328, 164, 84, 44, 24, 14
644, 328, 164, 84, 44, 24, 14
A. 44
B. 84
C. 164
D. 328