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If a and b are prime numbers, which of the following is true?I. a2 has three positive integer factors.II. ab has four positive integer factors.III. a3 has four positive integer factors.Codes

HCF and LCM of two numbers is given. It is possible to ind out the two numbers uniquely ifI. either sum or difference between the two numbers is known.II. HCF of two numbers = LCM of two numbers.III.

A group of four numbers has only one prime number amongst them. Which of the following must be true about the group?I. HCF of the four numbers of the group is .either 1 or equal to that prime number.I

A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, “How many gold coins do we have?” After pausing a moment, he replied, “Well! I

Nitin was counting down from 32. Sumit was counting upwards the numbers starting from 1 and he was calling out only the odd numbers. What common number will they call out at the same time if they were

N is the smallest number that has 5 factors. How many factors does (N - 1) have

Out of 52, 62, 70, 82, 78, 66, numbers that have 13 as factors are

a, b, c, d, and e are five consecutive numbers in increasing order of size. Deleting one of the five numbers from the set decreased the sum of the remaining numbers in the set by 20%. Which one of the

A 2's-complement adder-subtracter can add or subtract binary numbers. Sign-magnitude numbers represent _____ decimal numbers, and 2's complements stand for _____ decimal numbers

The LCM and HCF of two numbers are 2970 and 30 respectively. Prime factors of the product of two numbers are:

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