TCS Company Numerical Ability Probability

How many two-digit numbers are there which, when subtracted from the number formed by reversing its digits as well as when added to the number formed by reversing its digits, result in a perfect square?
option
a) 1
b) 2
c) 3
d) 4

Read Solution (Total 5)

TCS Other Question

Person travels to a hill, if he goes from A to B with speed of 4kmph and returns back to B with speed of 5kmph. What is his average speed of journey? A thread is marked into three parts whose lengths are in the ratio 2:5:6. Two types of knots A and B reduce the length of the thread by different lengths. On the first part, 6 knots of type A are made, on the second part 10 knots of type B are made and on the third part, 5 knots of type A and 5 knots of type B are made. After this, the lengths of the three parts taken in the same order, are in the ratio of 1 : 7 : 8. What is the ratio of the reduction in length due to knot A to that of knot B?
a) 3 : 5
b) 4 : 5
c) 5 : 4
d) 5 : 3