The first pair of numbers bear a certain relationship. The same relationship is required to be found in the other pair, Find that missing number : 35 : 6 : : 120 :?

What is the greatest possible speed at which a person can walk 13·3 km and 20·9 km so that the time (in hours) required in each case is a whole number?

Seven times a two-digit positive number is equal to four times the number obtained by reversing the order of the digits. How many such two-digit numbers are there?

A number when divided by 342 gives a remainder 47. When the same number is divided by 19, what would be the remainder?

If p is the difference between a number and its reciprocal and q is the difference between the square of the same number and the square of its reciprocal, then what is p⁴ + 4p² equal to ?

A 2-digit number is such that the sum of the number and the number obtained by reversing the order of the digits of the number is 55. Further, the difference of the given number and the number obtain…